Ive had that happen multiple times in the past! People say "Why is it taking so long to get my damn order?" Uhh.. you're staring at your answer buddy.

Or they tell me to just open up another register. o_0? How is that going to work when I 1. don't have the codes and 2. am still only one person! I'm not making them stand in line. If they are that fed up with how my manager is running things they should go somewhere else. It'll do us both a favor.