In one of the show's most famous scenes, Winston adopts the persona of Theodore K. Mullins to break up a fight between Nick’s multiple dates, delivering a dramatic, spiritual-inspired monologue: "Who am I? Well, I am Theodore K. Mullins. And Nick is my lover on the down low. Tell her, Nick."
The runner who yells "I'm peeing!" during the 10K is David Wain, the director of the episode and filmmaker known for Wet Hot American Summer .
If you'd like, I can provide more from Winston's Theodore K. Mullins speech or a detailed breakdown of the other roommates' secrets.