Madonna's halftime show at the Super Bowl wasn't just notable for M.I.A.'s middle finger. At one point during the performance, a backup dancer pulled off an impossible-looking move that can only be described as a "windmill foot."

Seriously, how did he manage that? Is this dancer double-jointed? Does he have a dislocated knee? If you have any theories, we'd like to know.

[via BuzzFeed]