When confronted with an armed man, your best option is to run..run..run.
Did anyone notice this voice-over right after Jack smashes the thug in the limousine window? The guy riding shot-gun pulls a pistol while Jack holds the other guy in a headlock.
The voice-over that comes on at that moment seems like a Police talk-down happening nearby, but it's really just an Avant Garde loop added to the scene. I thought it was kind of weird, but cool as well.