The Euclid Alternative - S2-E5
Question: Though it comes up in other episodes as well, this one is focused on Sheldon needing a ride everywhere he goes because he can't drive, not to mention his not being welcome on the bus. Of course, this story element would be nonexistent if there was a simple answer, but it does beg the question: Does Pasadena not have taxicabs?
Answer: Sheldon DID finally use a taxi when going to the airport to see and propose to Amy in New Jersey.
The Classified Materials Turbulence - S2-E22
Question: The piece of plastic Howard tells Raj is put in pizza boxes to keep the lid from touching the cheese—is there an actual name for it?
Answer: It typically goes by the name "pizza saver", but it's often called a pizza stool or pizza table (some have 3 legs and some have 4). When Carmela Vitale was issued a patent, she called it a package saver.
The Cushion Saturation - S2-E16
Question: Penny obviously took off her shoes in her first scene but where are they in the whole scene?
Answer: I've gone and looked over the entire episode. The first scene is of Leonard, Sheldon, Howard, Raj and Leslie playing paintball, and Penny is not present in the scene. The next scene is in the cafeteria in the university, and Penny is not present in this scene either. The next scene after that, they are at the apartment and Penny is present, but every time her feet are seen in the frame, she is wearing shoes. There is never a moment in which she does not have her shoes on. She also has her shoes on in every other scene she is present in. Is it possible you were referring to a different episode?
Chosen answer: It does. The variable cleanliness of the cab and the habit of taxi drivers to engage customers in small talk would be too much for Sheldon to handle, and not an option for him.
Captain Defenestrator