March 20, 2009 at 04:00 AM EDT

Freaks and Geeks (2000)
Segel says his uncomfortably sincere serenade to Lindsay (Linda Cardellini) was ”an empowering moment for me. We knew it had to be big comedy.”

Undeclared (2001)
In a John Hamburg-directed episode, he sobs after a college girl dumps him. While crying may draw laughs, ”what’s much, much funnier is a guy just losing his s—.”

Knocked Up (2007)
Those improvised one-liners that discomfited Alison (Katherine Heigl)? Blame writer-director Judd Apatow. ”Judd said, ‘Whoever is funniest, I’ll keep in the movie.”’

Forgetting Sarah Marshall (2008)
Segel shot his nude breakup scene in front of a large crew over two 14-hour days. ”You really are being judged on your criteria,” he jokes.

You May Like