This response is particularly useful when someone suddenly comes in from the side, trying to intimidate you, especially when you're having fun teasing someone. They despise seeing someone having fun, and have delusions of grandeur. (–Source: taxi1010.com stargate22)

"Don't rub it in."
—Location! Ever hopeful.
—Just sneak it in.

"Eat me!"
—Location! Ever hopeful.
—I don't want to be the stooge of a fool.

"Oh, my God! Anyone who sees this is going to think I'm shallow!"
—Location! Ever hopeful.
—Get a pitchfork.

"Shut your hole!"
—Location! Ever hopeful.
—You're not bothering me at all, sweetie pie.

"Do you always read other people's phone messages?"
—Location! Ever hopeful.
—The life of Demento.

"Is it yours?"
—Location! Ever hopeful.
—I'm going to get another one.

"You're not supposed to do that."
—Location! Ever hopeful.
—I'm going to let you talk to Andy ... And 'e walks with me; And 'e talks with me; And 'e holds my hand; And he tells me I'm bad.

"Pick on someone your own size."
—Location! Ever hopeful.
—People really get caught up in greed, don't they?

"Sometimes we need that – You better learn how to deal with people instead of sitting behind a desk!"
—Location! Ever hopeful.
—I'm busy! I'm creating The Hulk!

"You're the most helpless person in the world!"
—Location! Ever hopeful.
—Slowly.

"Okay, DICKIE!"
—Location! Ever hopeful.
—I'd be happy, too.

"Up yours!"
—Location! Ever hopeful.
—To be with the rest of your kind.

"What are you writing?"
—Location! Ever hopeful.
—They cost too much – I'm waiting for the price to come down.

["You must be a Californian." "No, I'm not."] "I am." [Menacingly, from a third party]
—Location! Ever hopeful.
—This guy has what you call delivery! ... For no reason at all they're very serious about certain things ... When it's over, it's over!

"It doesn't matter – It's meaningless." [Teen-age boy to his father]
—Location! Ever hopeful.
—For someone my age – Come on! – I'm a piker.

"Thanks for your concern." [Sarcastically]
—Location! Ever hopeful.
—Simple shepherds of the north, Knifing ministers through the throat.

"You know, you're the one who kept me from inserting a subclavical shunt in your father for two weeks, and now he's dead." [From a vicious, lying physician, as the elevator door closes in your face]
—Location! Ever hopeful.
—Very crude.

"I'll put that in my notebook and never forget it." [Theatrically telling everyone what she's going to do with the sticker I gave her]
—Location! Ever hopeful.
—Do your worst!

"It's going to be a shitty day."
—Location! Ever hopeful.
—The glamour ... The guy gets to you after a while ... He's a recessive anal compulsion – All he's interested in is dark shit ... You're going to love it.

"We've got Justice Kennedy writing decisions based upon international law, not the Constitution of the United States? That's just outrageous. And not only that, but he said in session that he does his own research on the Internet? That is just incredibly outrageous." (–Congressman Tom DeLay)
—Location! Ever hopeful.
—Is this Show and Tell? Werewolf of London (1935) ... That's a good one!

"Do you feel bad about yourself?"
—Location! Ever hopeful.
—May your time machine not stop in the dark cave.

"Kiss off!"
—Location! Ever hopeful.
—All that stuff.