Yes, last night's American Idol finale chose David Cook as the winner, violating everything Simon Cowell said the night before about David Archuleta's "knockout." And yes, 12 million more people voted for Cook than Archuelta. And yes, an early Nielsen estimate pegs total viewers at 26.5 million, the shows best numbers since March, and which could beat last year's audience of 25.3 million. But hands down, the most interesting thing about last night's finale – and it certainly wasn't performances by Jordin Sparks, Carrie Underwood, or any of the Top 12 contestants, or even Mike Myers' The Love Guru tie-ins – was this Guitar Hero ad featuring Cook doing a riff on Tom Cruise in Risky Business. Yes, they made Archuleta do one too, but that was seriously awkward.