I finally saw the premiere episode of Robot Chicken, and the nerd guy, Arthur Kenniston, Jr., and his classmates travel to the Junsekyo Springs. Arthur finds the "Spring of the Drowned Girl", and contemplates jumping in and getting a girl's body. In his fantasy, he has girl-type Ranma aka Ranko's body, with his head still a boy's, and he does a female action hero (Lara Croft, Elektra, Catwoman) costume montage, and flashes his/her boobs at a clerk to get free stuff. Hilarious part where he/she enters the girl's shower house in his "cursed" form, and one of the girls was like, "Doesn't hot water change Ranma-chan back into a boy?" The girls then proceed to pummel the nerd. Arthur then decides the curse is worth it and jumps into the Spring of Drowned girl...only to hear from one of the guys in the tour group with a guide book to the springs read the girl who drowned in the spring where Arthur is submerged to his neck was 400 pounds and had bad flatuence.
The next scene, the poor nerd guy/girl is at school, and is now female, 400 pounds and has bad flatuence.