how i met your mother
Early in the seasons of CBS’s How I Met Your Mother, Marshall and Barney agree to a Slap Bet when debating the contents of Robin’s past as a teen music star. Basically, Marshall wins the right to slap Barney 5 times as hard as possible whenever the feeling … hits!

Over the years Marshall has been terrorizing Barney with the potential of slaps and after another bet, Marshall gets Barney to give up 3 more slaps. That brings the total up to 8, of which 6 are accounted for. Here they are in fantastic GIF format.

Happy Slapsgiving. [via]