I paralyze with laughter. 3.Imperfection - a kid has big ears you laugh at him because, his ears arent perfect. A fat kid does a belly flop, his dive is imperfect you laugh. I recently wore pink-plad swim trunks to a swim meet, everyone had a good laugh, my shorts were imperfect. It's all humerous.
Unexpected things are also humerous.
2.A man tries to say 'she sells sea shells by the sea shore' when half way though a bear jumps though the wall and lands on the guy.