How I Met Your Mother Season 9 Episode 14: Slapsgiving 3: Slappointment in Slapmarra
5 second plot: Marshall gives Barney the slap of a thousand exploding suns. And Boys II Men sing a song.
5 second review: This is a really crazy episode. When did this show stop going in a certain direction? I'm not sure if I like it or not... It's definitely really funny. But it has got nothing to do with the story. Are they running out of ideas or was this a brilliant side-track?