In the original script, Channing Tatum and Alex Pettyfer didn't show up to the sorority house dressed as cops. That idea, which ended up being featured so prominently in the film's trailer, came from costume designer Christopher Peterson (a 2011 Emmy nominee for his work on Boardwalk Empire). ''I just thought it would be funny to invent some cover for them being there that would add to the element of surprise [for the girls],'' he says.
Before Tatum and Pettyfer arrived on set that day, Peterson informed director Steven Soderbergh that he'd rigged the pants for tear-away something Tatum and Pettyfer weren't necessarily prepared for since filming of the club dance scenes was still a few weeks away. ''Sure enough, Steven and [producer Gregory Jacobs] blocked the scene and said to Channing, 'And then you're gonna tear away your pants.' And Channing turned and looked at me, and I shrugged and said, 'Oops. Sorry,''' Peterson recalls, laughing. ''You're welcome, America.''
The best part: The extras weren't expecting the tear-away pants either. Soderbergh always wanted to capture the crowd's true reaction. That's why on a first take of any dance in the club, he would point the camera at the audience instead of at the actors.
Choreographer Alison Faulk, costume designer Christopher Peterson, and music supervisor Frankie Pine reveal inside stories behind the movie's eye-opening dance numbers