This is one of those birthday gifts that can backfire very quickly, however it seems like it was pulled off just fine by the former 49ers QB’s wife.

Steve’s wife, Barb, called Flash Mob America to help her organize the biggest birthday surprise ever. Friends, family, and strangers got together to celebrate Steve’s 50th birthday to make it one he’d never forget.

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And yes, as Jimmy Traina pointed out: “the song the people danced to is Earth, Wind & Fire’s Boogie Wonderland.