A WEDDING guest in the US has broken the ultimate unwritten rule - don't mess with a bride on her wedding day.
Prankster Jason picked the wrong day to level the score with groom Jesse, placing an exploding airbag in the couple's wedding cake.
He sets it off as the bride and groom pose for happy snaps, covering them with cake.
Prankster Jason explodes the wedding cake as the couple have their picture taken.
Cue reaction from bride, who understandably doesn't see the funny side of the joke.
The bride was understandably unimpressed, chasing down Jason for a beating.
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