Open the landing bay doors, shuttle craft approaching.

Leonard

Howard: You gotta like this. The girlfriend, the ex-girlfriend bonding over your rooty-tooty stinky booty.
Leonard: Kill me.
Sheldon: It wouldn't help. The human body is capable of being flatulent for hours after death.

Bernadette: The thesis committee accepted my doctoral dissertation. I'm getting my Ph.D!!
(the other congratulate her)
Penny: Wow! So that means that....(points around the table to all the Ph.D's) You're a doctor, you're a doctor, you're a doctor, YOU'RE a doctor, and Howard....you know a lot of doctors!!

Howard: You gotta like this: the girlfriend.....the ex-girlfriend, bonding over your rooty-tooty stinky booty?
(all but Leonard laugh)
Leonard: Kill me!
Sheldon: It wouldn't help. The human body is capable of being flatulent for hours after death.

The Big Bang Theory Season 4 Episode 24 Quotes

Penny: Hey, Sheldon, did you change your Wi-Fi password again?
Sheldon: Yes, it's "Penny, get your own Wi-Fi." No spaces.

Sheldon: Here's an interesting fact about alcohol ... Man is not the only species that ferments fruit in order to become intoxicated. Can you guess what the other is? Hint: sometimes they pack the alcohol in their trunks.
Penny: Monkeys
Sheldon: When does a monkey have a trunk?
Penny: When a suitcase just won't do
Much later - Sheldon: And the answer was elephant.