I've been cheered by thousands, booed by thousands, but nothing feels as bad as the booing inside your own head during those ten minutes before you fall asleep.
Nice to see your own fans booing you.
I think it's bad when people start booing between serves.
In life, I'd much rather have people laughing at me than booing me.
If you're standing in the middle of a ring and you're playing the villain, and everyone is booing and throwing things at you, that's real.