What's the worse you have done?

Ok so there are a lot of very seriously topics out there so let's try lighten things up a bit. A topic on here reminded me of the things brothers, sisters, cousins and even sometimes parents have done to there children for entertainment. Like dressing them up in funny looking clothes and taking photos to embarrass them when their older, putting a little boys hair in pigtails, or telling you little sister there was a crocodile under her bed. Just the mean things that as a kid you thought was funny.