What do you mean two hundred dollars ?

A very shy guy goes into a tavern and sees a beautiful woman sitting at the bar. After an hour of gathering up his courage, he finally walks over to her and asks tentatively, “Umm, would you mind if I chatted with you for a while?”
She responds by yelling at the top of her
lungs, “No, I won’t sleep with you tonight!” Everyone in the bar is now staring at them.
Naturally, the guy is hopelessly and completely embarrassed, and so he slinks back to his table.
After a few minutes, the woman walks over to him and apologizes.
She smiles at him and says, “I’m sorry if I embarrassed you. You see, I’m a graduate student in psychology and I’m studying how people respond to embarrassing situations.”
To which he responds, at the top of his lungs, “What do you mean two hundred dollars?”