How I Met Your Mother: Season 3, Episode 10

3 - 10: The Yips

After everyone joins a gym, Barney sees Rhonda (the woman who took his virginity) there. After learning that his performance with her was poor, he loses his ability to approach women. Barney loses his 'mojo' and heads to the Victoria's Secret Fall Fashion Show party to try to get it back, but he's put to the test when he meets Heidi Klum.