I beg your pardon!
The British way of saying "Excuse me, what the hell?" but with more class and less brains.
"I beg your pardon!" said the man as he tripped over a pigeon.
"I beg your pardon!" yelled the teacher after the student said "I don"t know."
"I beg your pardon!" as if he was in a fancy suit and not in a subway.