If you are triggered, you may suddenly feel very angry — like so angry you want to hit something or quit the program. You may just have the urge to run, like you have to get out of the room and away from people. You might feel overwhelmed by a desire to drink or use or act out in some way. Your body may be physically responding to your memories — sweating, racing heartbeat, tightness in your chest, feeling like you are going to throw up. Or you may just feel yourself shutting down, like you are disconnecting from the world around you.
–Melissa Haas, Emotions 101