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This athlete’s signature move was born when his younger brother dared him to perform a Tony Yayo/50 Cent dance move on stage infront of spectators.
The athlete added a line along with the move and both because hugely popular.
Name the athlete & the move.

Show Answer
The athlete is John Cena & the move is 'You can't see me'.
Here's a Video of John Cena talking about the origin.
Here's the Video with Tony Yayo performing the original move, at 0:30 mark.