"Try not to embarrass us."
"No, no, no, don't tug on that. You never know what it might be attached to."
"I've been ionized, but I'm okay now."
"Uh, Dr. Banzai, you... you forgot your thruster." Reply: "Why don't you hold onto it for a while?"
"The only reason for time is so that everything doesn't happen all at once."
"Live like you're gonna die tomorrow and study like you're gonna live forever."
"Asking is a polite way of demanding."

My personal favorite: "I speak Spanish to God, French to women, English to men, and Japanese to my horse."