I was just watching "Tropic Thunder". Pretty funny movie. Nick Nolte plays a character named Four Leaf Tayback, a grizzled Viet Nam vet.

Nolte and the guy that runs the demolition stuff on the set are talking:

Demo Guy: "That's a nice sidearm. What kind is it?"

Tayback (Nolte...in a deep, raspy, Clint Eastwood type of voice while looking over the jungle with a 1000yd stare): "I don't know what it's called. I just know the sound it makes when it takes a man's life."

I thought that was quite possibly the best gun line ever said in a movie. And you could use it so many scenarios when someone asks you a question.