I hate it when people interrupt me while I'm helping one customer in order to ask for help themselves.
What am I supposed to do? I'm already busy. Legitimately helping someone, doing my job - I wish I could point out how rude they're being but I can't. Although today I came really close. Some guy, who had already interrupted me once - when I was mid sentence, I kid you not - then proceded to yell at me from across the store, asking "Is there anyone who will help me with this?" He was very impatient. And rude. And I was the only one he could see, and we were all busy with other people.
So I said, as he turned away, "Can you not see I'm busy with someone?" and felt bad instantly only because my customer was so nice and I hated to expose my frustration in front of her. Oh well. Guess what, I'm human too, customer. And idiots annoy me.
At least there were no Children of the Exorcism today.