A groom decided to cash in on a "slap bet" when his buddy — and a church full of guests — least expected it. As the husband-to-be approaches the alter and hugs each one of his groomsmen, he slaps the last one across the face.

 

A slap bet, popularized by CBS' "How I Met Your Mother," allows the winner of the bet to slap the loser as hard as he can. The best part, as seen in this video, is that it can be redeemed at any time with no warning.