By Karen Valby
Updated March 29, 2011 at 03:21 PM EDT

“I’m going to get in my underwear in front of all of you guys,” announced Rainn Wilson, one night after the SXSW premiere of James Gunn’s new film, Super. “I hope you don’t mind.” The Office star, who plays an endearingly unhinged everyman-turned-superhero, invited EW up to his hotel suite as he crammed himself back into his sweat-coated Crimson Bolt costume. To help promote the film, he then unleashed his Crimson sense of righteousness — “Shut up, crime! — on the streets of Austin. Come along for the ride with this exclusive video.

*How cute are Rainn Wilson and his wife, fiction writer Holiday Reinhorn?