Once I've gotten myself out of the immediate situation I tend to sit down and shake for a while. My system always wants to do that when coming down off an adrenaline surge. After that I think through what happened and come to terms with it as best I can. Finally, I find a friend to talk with, get it out of my system, and move on to other things that are more interesting to talk about. If no one is available, I engage in some activity that I find relaxing (reading, watching a movie, walking in the woods, etc.).