Working at Best Buy
"I came in and bought this wireless mouse and keyboard earlier and it won't work with my computer!"
Me "What do you mean by 'It wont work'?"
"It just doesn't, I put in the batteries, and turned it on, and nothing happens. Either you sold me bad batteries or a bad keyboard!"
Me "Did you plug the receiver in?"
"The what?"
Me (Getting angry now) "It's the little black thing, with the pretty lights on it, you plug it into the usb ports."
"No, this is wireless it doesn't work like that! Can I get a manager, or an employee that knows what he's talking about?"
I just stormed off in a blind fury, got the manager and went on break...
Humanity, I hate you!