Laughter therapy

I attended a laughter therapy course today. I learned a new word to avoid, Karoshi, and how to get high on laughter. The course didn't really give me much though, perhaps because I already know about the endorphines, the body's own drog etc. Or that I'm a person who laughs a lot anyway. But I do admit that the exercises to get us to laugh were quite stress releaving: "Pretend you're a male dog who marks his territory by peeing on it. Go out there and pee on each other."!