Not an expert in firearms or anything but... listening to the audio, this seems like the most likely chain of events, check my work:

1. Protestors are clearly blocking traffic

2. Someone decides to drive through because it's a fucking public road
   Someone turned right and ended up getting blocked by people walking on the fucking public road

3. Protestors further surround vehicle and start banging on it

4. Driver probably crawls forward to push his way to safely

5. The gunman decides this is intent to run protestors over

6. The gunman or someone with him yells

EVERYBODY BACK UP

7. Gunman fires rifle five times into tires of vehicle to disable it

8. Driver, now realizing he's in danger, draws his weapon

9. Driver, seeing gunman approach, fires three times in self-defense

10. One more rifle discharge as gunman goes down*
    *Possibly a shot fired by armed "medic" nearby

11. Driver escapes, flags down officer, reports incident

EDIT: Updated based on additional viewpoints

Not an expert in firearms or anything but... listening to the audio, this seems like the most likely chain of events, check my work:

1. Protestors are clearly blocking traffic

2. Someone decides to drive through because it's a fucking public road
   Someone turned right and ended up getting blocked by people walking on the fucking public road

3. Protestors further surround vehicle and start banging on it

4. Driver probably crawls forward to push his way to safely

5. The gunman decides this is intent to run protestors over

6. The gunman or someone with him yells

EVERYBODY BACK UP

7. Gunman fires rifle five times into tires of vehicle to disable it

8. Driver, now realizing he's in danger, draw his weapon

9. Driver, seeing gunman approach, fires three times in self-defense

10. One more rifle discharge as gunman goes down*
    *Possibly a shot fired by armed "medic" nearby

11. Driver escapes, flags down officer, reports incident

EDIT: Updated based on additional viewpoints

Not an expert in firearms or anything but... listening to the audio, this seems like the most likely chain of events, check my work:

1. Protestors are clearly blocking traffic

2. Someone decides to drive through because it's a fucking public road
   Someone turned right and ended up getting blocked by people walking on the fucking public road

3. Protestors block/surround vehicle to stop driver

4. Driver probably crawls forward to push his way to safely

5. The gunman decides this is intent to run protestors over

6. The gunman or someone with him yells

EVERYBODY BACK UP

7. Gunman fires rifle five times into tires of vehicle to disable it

8. Driver, now realizing he's in danger, draw his weapon

9. Driver, seeing gunman approach, fires three times in self-defense

10. One more rifle discharge as gunman goes down*
    *Possibly a shot fired by armed "medic" nearby

11. Driver escapes, flags down officer, reports incident

EDIT: Updated based on additional viewpoints

Not an expert in firearms or anything but... listening to the audio, this seems like the most likely chain of events, check my work:

1. Protestors are clearly blocking traffic

2. Someone decides to drive through because it's a fucking public road
   Someone was driving on open and clear roads and then turned right and ended up getting blocked by people walking on the fucking public road

3. Protestors block/surround vehicle to stop driver

4. Driver probably crawls forward to push his way to safely

5. The gunman decides this is intent to run protestors over

6. The gunman or someone with him yells

EVERYBODY BACK UP

7. Gunman fires rifle five times into tires of vehicle to disable it

8. Driver, now realizing he's in danger, draw his weapon

9. Driver, seeing gunman approach, fires three times in self-defense

10. One more rifle discharge as gunman goes down*
    *Possibly a shot fired by armed "medic" nearby

11. Driver escapes, flags down officer, reports incident

EDIT: Updated based on additional viewpoints

Not an expert in firearms or anything but... listening to the audio, this seems like the most likely chain of events, check my work:

1. Protestors are clearly blocking traffic

2. Someone decides to drive through because it's a fucking public road

3. Protestors block/surround vehicle to stop driver

4. Driver probably crawls forward to push his way to safely

5. The gunman decides this is intent to run protestors over

6. The gunman or someone with him yells

EVERYBODY BACK UP

7. Gunman fires rifle five times into tires of vehicle to disable it

8. Driver, now realizing he's in danger, draw his weapon

9. Driver, seeing gunman approach, fires three times in self-defense

10. One more rifle discharge as gunman goes down*
    *Possibly a shot fired by armed "medic" nearby

11. Driver escapes, flags down officer, reports incident

Not an expert in firearms or anything but... listening to the audio, this seems like the most likely chain of events, check my work:

1. Protestors are clearly blocking traffic

2. Someone decides to drive through because it's a fucking public road

3. Protestors block/surround vehicle to stop driver

4. Driver probably crawls forward to push his way to safely

5. The gunman decides this is intent to run protestors over

6. The gunman or someone with him yells

EVERYBODY BACK UP

7. Gunman fires rifle five times into tires of vehicle to disable it

8. Driver, now realizing he's in danger, draw his weapon

9. Driver, seeing gunman approach, fires three times in self-defense

10. One more rifle discharge as gunman goes down*
    *Possibly a shot fired by armed "medic" nearby

11. Driver escapes, flags down officer, reports incident

Not an expert in firearms or anything but... listening to the audio, this seems like the most likely chain of events, check my work:

1. Protestors are clearly blocking traffic

2. Someone decides to drive through because it's a fucking public road

3. Protestors block/surround vehicle to stop driver

4. Driver probably crawls forward to push his way to safely

5. The gunman decides this is intent to run protestors over

6. The gunman or someone with him yells

EVERYBODY BACK UP

7. Gunman fires rifle five times into tires of vehicle to disable it

8. Driver, now realizing he's in danger, draw his weapon

9. Driver, seeing gunman approach, fires three times in self-defense

10. One more rifle discharge as gunman goes down*
    * Possibly a shot fired by armed "medic" (eyeroll) nearby

11. Driver escapes, flags down officer, reports incident

Not an expert in firearms or anything but... listening to the audio, this seems like the most likely chain of events, check my work:

1. Protestors are clearly blocking traffic

2. Someone decides to drive through because it's a fucking public road

3. Protestors block/surround vehicle to stop driver

4. Driver probably crawls forward to push his way to safely

5. The gunman decides this is intent to run protestors over

6. The gunman or someone with him yells

EVERYBODY BACK UP

7. Gunman fires rifle five times into tires of vehicle to disable it

8. Driver, now realizing he's in danger, draw his weapon

9. Driver, seeing gunman approach, fires three times in self-defense

10. One more rifle discharge as gunman goes down

11. Driver escapes, flags down officer, reports incident

Not an expert in firearms or anything but... listening to the audio, this seems like the most likely chain of events, check my work:

1. Protestors are clearly blocking traffic

2. Someone decides to drive through because it's a fucking public road

3. Protestors block/surround vehicle to stop driver

4. Driver probably crawls forward to push his way to safely

5. The gunman decides this is intent to run protestors over

6. The gunman or someone with him yells

EVERYBODY BACK UP

7. Gunman fires rifle five times into tires of vehicle to disable it

8. Driver, now realizing he's in danger, draw his weapon

9. Driver, seeing gunman approach, fires three times in self-defense

10. Driver escapes, flags down officer, reports incident.