PlotWhen Leonard learns that Stuart is going on a date with Penny, he jealously gives Stuart advice to sabotage it, but his guilt soon gets to him. Meanwhile, Howard learns that a waste disposal system he built for the Space Station is going to malfunction and hurries to find a means to fix it.
- Brick Joke: The meat loaf stuck on the ceiling.
- Don't Explain the Joke: Sheldon keeps explaining all the jokes about Howard's space toilet.
- Literal Metaphor: Howard has to find a way to fix the space toilet or the waste material is going to get into the power turbines on the ISS.Raj: You mean so it doesn't hit the fan?
- Relationship Sabotage: Leonard gives Stuart bad advice for his date with Penny. However, he later comes to regret it.
- Toilet Humor: A lot of it regarding the fact Howard's zero gravity waste disposal system is on the verge of failing.
- Wrong Name Outburst: Stuart tells Leonard that Penny called out Leonard's name during sex. Stuart is just happy she didn't say "You know I'm a dude, right?"