In an attempt to deliver a devastating final slap to Barney, Marshall explains how he mastered the Slap of A Million Exploding Suns.
When Polly is apprehensive about putting herself up for a promotion (wine and cheese manager) and Natalie announces that she's playing a "hillside" in the school play, Elaine and Max decide to get involved in order to make sure that Natalie and Polly are living up to their full potential.
