"'Tis better to be a witty fool, than a foolish wit."
Some clown in Shakespeare's Twelfth Night (Or was it Midsummer Night's Dream???)
"Just stop asking questions and do it! I cannot see beyond what I just told you to do!"
Me, talking to my 10 year old son after telling him to empty the dishwasher for the 4th time in ten minutes.
"I've got a straw! Want a demonstration???"
The Tick to some guy in a coffee shop that was questing whether he was a real tick, because ticks suck blood. (A great comic book and cartoon!)
"I brought you into this world, and I can take you out!"
Every parent, to every child, at least once.