"A love story in reverse."
In an attempt to deliver a devastating final slap to Barney, Marshall explains how he mastered the Slap of A Million Exploding Suns.
Josh Radnor
Ted Mosby
Neil Patrick Harris
Barney Stinson
Jason Segel
Marshall Eriksen
Alyson Hannigan
Lily Aldrin
Cobie Smulders
Robin Scherbatsky
Cristin Milioti
Tracy McConnell
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