Everybody deals with stress in their own way. Some people decide to cower away and cry in a corner, others try to fight their way through any stressful situations, while some just tend to freeze and bottle everything inside until it bursts out like a balloon that's been inflated too much and can't handle the pressure anymore.
Regardless of how you deal with this sort of a situation, what you need to understand is that when you are stressed, and your body immediately forces itself into making the right decision to escape the situation unharmed.