Tom Cruise has been tirelessly promoting Knight and Day, and during the interviews he's been chatting about his wonderful Father's Day and about his now-famous Les Grossman dance at the recent MTV Movie Awards. Thursday night, he did all that.

On The Tonight Show, but Jay Leno kept pressing him for details of how the dance with Jennifer Lopez came about, including, "Whose idea was the butt slapping? Was that your idea?" Cruise got uncomfortable.