http://health.howstuffworks.com/human-nature/emotions/other/laughter.htm/printable
"The superiority theory comes into play when we laugh at jokes that focus on someone else's mistakes, stupidity or misfortune. We feel superior to this person, experience a certain detachment from the situation and so are able to laugh at it."
I started laughing at someone else's expense from #20
"The superiority theory comes into play when we laugh at jokes that focus on someone else's mistakes, stupidity or misfortune. We feel superior to this person, experience a certain detachment from the situation and so are able to laugh at it."
I started laughing at someone else's expense from #20