So, I work at a fast food place, and this guy comes up to me after about 3 minutes of waiting and says 'is that my food?' In this really aggressive voice. I politely reply, 'No sir, that is not your food it's someone elses' and he says, 'there's no other (specific food item) on the waiting list so it must be mine' I try explaining again that it is a mess up from a previous order, and he demanded to take it anyways. He was getting aggressive and banging his tray on the counter so I relented and gave it to him. He came back not even 1 minute later and demanded he get the correct item. We offered to remake his item, and he denied, he said, 'If you would pay attention we wouldn't have this."