High School seniors are notorious for pranks, sometimes of EPIC proportions.  And it's not just an American tradition.  A school kid in London decided to do the unbelievable in the end of year photo, forcing a complete recall shortly after yearbooks were distributed.  Gotta admit though, it's gotta be quite the insult the prank went unnoticed until it was too late. Also a bit of irony in the name of the advisor who caught the flaw...

What prank did you pull your senior year?