This is actually a point my wife has made regarding "armed population" arguments  Would a normal, sane, well adjusted, average joe/jane, pull the trigger? Quickly enough? Without hesitation?

Drawing from martial arts and firefighter training, taking action under duress involves three parts:

- committing to action (draw and aim)
- taking action (pull trigger)
- thinking "holy shit" (actually think about how messed up the situation is)

A large portion of training is simply making sure all three events occur, and occur in that order. Most of the population lacks training and experience.