That "bully" customer is the worst kind of customer. I don't care much for any of those types, the completely oblivious or ridiculous idiots, but that one is by the the worst kind of customer in history. He's the first person to throw the "customer is always right" **** in your face and demand you to bend over backwards for him.
As for the pie-lady.. i'll choose to refrain from making a sexist joke here since GPs on her war path again, and demands all of us to hear her roar
just kidding GP i <3 U! .. I will say.. hey, that sorta stuff actually happens!!
Once when i was working retail, i helped this nice couple out when i was the only one in the store (i was short staffed and sent my only other staff member on lunch) , and they left after purchasing a few things, came back and offered me taco bell! How nice is that?

Oh and just a month ago some nice older women gave me a $10 tip for.. well nothing. I did absolutely nothing. I even told her as much, tried to return it saying i couldn't accept it and she said nonsense.