Laughing is natural in heavy distress situations. Endomorphins and the like, plus the psychological "morale boost" - it's a sort of safety. When I hurt myself (no broken legs until now, but some heavy bad cut with lots of blood everywhere), one of my first reactions is more or less always to laugh and joke at the situation. Not that I do not feel pain, or that I do not realize the gravity of the situation - I really think it's just a way to dedramatize. Relativism, stuff like that.

And I have hard times crying too. When I was a kid I cried a lot (not really a crybaby, but quite emotive). As an adolescent I had to quickly remedy to that, because it was really embarassing. That, added to the fact I wanted to blend as much as possible with the mass, led me to repress a lot of anger, sorrow and anxiety. I somehow learned how to let go some anger from time to time, but sadness I never really could.

The main things that did bring me to tears though, are nostalgia and "human-made beauty" and inspirational stuff (not the image macro ones, the large meaning of the term). And I can tell that when you don't cry often and manage to let go some pressure, you feel incredibly good afterwards. Double emphasis on incredibly.

Oh, and I spent a night to cry really hard once, having drunk my brains out. I didn't even remember it, someone told me the next day. I was kinda embarassed, but I knew why I felt so peaceful and relaxed that day.