1.) Did you "shut down"?
One sign that you are panicked can be an unresponsive, catatonic reaction. You feel numb, turned off, and generally you just sit there while others may be busy. This can be hard to diagnose, since you have basically "zoned out." If you find yourself in this debilitated state, try to use your senses to "wake up" and re-engage yourself in the situation. Focus on your 5 senses, one at a time, to regain control over yourself. What are you seeing? Name those things. What do you hear? Name those things. Get your mind working again as best as you can during your reboot.