People who have worked at drive thrus, what is the weirdest thing you've heard from people who didn't realize you can still hear them after ordering?

Highs school:

Was taking the order of a dude who was slurring and talking really low, so I had to ask him to repeat his order a couple of times. When we were done I hear him call me stupid and some other lovely words. I take off the headset and tell my coworker I'm not dealing with that asshole at the window, and head around the corner, out of sight.

Car pulls up so I peek around...

(What my coworker sees) I wheel around the corner and take the bag of food. "So, you're the asshole"

My uncle, whose voice I didn't recognize, and probably had a reason for slurring.

He felt like an ass, and my mission was accomplished. My father still brings it up to him.

/r/AskReddit Thread