It's off of Full Metal Jacket.

"This is my rifle, this is my gun. This one's for shooting, this one's for fun!"

Or something like that.
Did you know the odds of a Vault-Tec shelter failing are 1,763,497 to 1?

So imagine life in a Vault-Tec Vault. Not just a future.
A brighter future... underground.

Patrolling the Mojave almost makes you wish for a nuclear winter.
Fantastic movie.
They're saying "This is my rifle, this is my gun, this is for fighting, this is for fun" and tugging on their junk on the words "gun" and "fun."
Hi, I'm Peter