Octavia: See that sign?
Octavia: Does it say I give a damn?
Octavia: That's because I don't. Next!
Sheldon: How am I going to get to work?
Leonard: Take the bus.
Sheldon: Oh, I can't take the bus. They don't have seat belts, and they won't let you lash yourself to the seat with bungee cords.
Leonard: You tried to lash yourself to the seat with bungee cords?
Sheldon: I didn't try, I succeeded.
From this episode on, the dart board on Leonard and Sheldon's door have (most likely accidently) been turned two steps. This makes the 12 go straight up, instead of the 20 (which is two steps clockwise from the 12).