Sheldon: Howard?
Howard: Yeah?
Sheldon: Your shoes are delightful, where did you get them?
Howard: What?
Sheldon: Bazinga! I don't care.

Leonard: How did she get you to do yoga?
Sheldon: Well, to be honest I thought she said Yoda.

Howard: My cousin has a cabin out in the woods.
Sheldon: I'm not going to a cabin in the woods. Did you see the movie "Cabin in the Woods?"
Leonard: Fine, we'll go to a hotel.
Sheldon: A hotel? Did you see "The Shining"?
Raj: We could go up to Big Bear and get a house on the lake.
Sheldon: Did you see "The Lake House"?
Raj: Nothing bad happens in "The Lake House"!
Sheldon: Not to them. To me. Time travelling mail box. The only time that travels was the hour and a half of my life down the toilet.
Leonard: Fine, we'll just stay here and do it.
Sheldon: Wait, you didn't suggest a beach house.
Leonard: You would go to a beach house?
Sheldon: Well, good Lord no. Have you seen "Jaws"?

Sheldon: I don't know how, but she is cheating! Nobody can be that attractive and this skilled at a videogame.

Raj: You want me to work with you?
Sheldon: For me!

Raj: I hate trains.
Sheldon: Oh, don't be silly. You love trains.

Sheldon: The last department party, Professor Finkleday cornered me and talked about spelunking for 45 minutes.
Leonard: Yes, I was there.
Sheldon: You know what's interesting about caves, Leonard?
Leonard: What?
Sheldon: Nothing!

Sheldon: We're gonna have to stop at Pottery Barn on our way to work. I bought these Star Wars sheets, but they turned out to be much too stimulating to be compatible with a good night's sleep. I don't like the way Darth Vader stares at me.

Leonard: We had a vote. Three of us voted for airplane. Sheldon voted for train, so we're taking the train.
Sheldon: Don't say it like that, Leonard. Say it like, "We're taking the train!"

Sheldon: You've got the brilliant Sheldon Cooper in your lab and are going to ask him to do the dishes? That's like asking the Incredible Hulk to open a pickle jar.

Sheldon: Rise and shine sleepy head, half the town probably is dead.

Sheldon: Penny, please don't hurt my friend.

Sheldon: I saw my mommy with a naked man and she was trying to be a mommy again.

Ramona: You are so witty.
Sheldon: Aren't I?

Sheldon: She is a girl, who is a friend, but she is not, forgive me for doing this, (air quotes) "my girlfriend".