Universal has uploaded a redband trailer for the raunchy comedy The Change-Up [CHNUP] marketed as from the director of Wedding Crashers and the writers of The Hangover. The body-switching comedy sub-genre gets the R-rated treatment with Ryan Reynolds [RREYN] as a single ladies man who changes lives with his married with children best friend, played by Jason Bateman [JBATE], through a magical fountain while they were relieving themselves. Well yes, you'll have to see for yourself, along with plenty of potty humor.