Robin: Wait, Marshall, you realize you'll only have one left after this. Are you sure you want to spend this slap today?
Marshall: Life is short. I figured, Slap-e Diem. Rule number one: the slap must occur before sundown, so as not to interfere with Lily's meal. Two, you have to decide amongst yourselves who gets to do it. Three, we're going to tie Barney to this chair, which shall henceforth be referred to as the slapping throne. Sound fair?