Quote from Marshall in Slap Bet
Lily: What the hell's a slap bet? Marshall: Whoever's right gets to slap the other person in the face as hard as they possibly can, but no rings. Lily: Are you really gonna do that? That's so immature. Marshall: You can be Slap Bet Commissioner. Lily: Oh, I love it. What are my powers? Marshall: Um, if a problem arises and we need a ruling, that's your job. Barney: But you have to be unbiased and put the integrity of slap bet above all else. This is an honor you will take with you to your grave. On your tombstone, it will read "Lily Aldrin, caring wife, loving friend, Slap Bet Commissioner." Marshall: And your tombstone will read, "got slapped by Marshall so hard, he died."