My guess is that a mob that is breaking your car windows out will be on you before you can spray them with anything effective.

car side windows are not especially strong or break resistant like your windshield is.

If you spray from inside a car, you will almost certainly do more to incapacitate yourself than any attacker.

there are really just three things you can do in a situation like denny found himself in.

1. Rev up the engine and get the hell out while running over as many rioters as is necessary to escape.

2. Shoot as many rioters as is necessary to get a chance to engage option 1.

3. take a serious and potentially fatal beating at the hands of the savages.

one thing that a lot of people do not get is that even option 1 is often unavailable, especially with smaller cars that do not have 4WD it is very hard to run over human sized obstacles.