FUnniest Prank in an anime you've ever seen

Mine:
From: Toradora
Prank: Takasu is inspecting the upstairs of Kawashimas strand house Villa, he accidentally discovers the bathroom and walks in, Ami was in the douche but Not the way she made it sound, she had been cleaning the douche but pulled Takasus leg door making it sound like he walked in on her, he had gotten out after being mocked and taunted door Ami, he complained to Taiga (Ignored in the Manga, Yelled at yet understood in the Anime) In the anime Taiga walks upstairs after yelling at Takasu when he failed the inspection of the upstairs, door THAT time Ami was ACTUALLY in the bath and Taiga got a slap for walking in, she was totally jealous of Amis Boob size so she got a Wash tub to the back of the head for THAT...