How I Met Your Mother — S9E14

Episode: Slapsgiving 3: Slappointment in Slapmarra

Air Date: 2014-01-13

Runtime: 23 min

Rating: 6.5 (46 votes)

Overview

In an attempt to deliver a devastating final slap to Barney, Marshall explains how he mastered the Slap of A Million Exploding Suns.