I was working at a very famous shoe store some years back when a custy and her kid came in right at opening. I was all alone and it was one of those mornings... You know the ones: phone ringing off the hook, paperwork to be done and about a zillion other things.
I greeted the woman no problem while her and her kid plopped on a bench for a chat for about 10 minutes ignoring me. Rude, but fairly normal.
She asked me for a few sizes and I got them for her, while juggling ups delivering shipment and phone orders. I got them for her, she decided on some and began her purchase.
As she goes to leave she turns to me and says, "You know I would've bought more if you would have actually helped me."
Before my smart ass brain caught up with my mouth I said to her, "Well ma'am, typically when people need or want help, they ask for it."
This woman looked like I just beheaded her child. She looked that offended that a retail slave would DARE speak back to her. She turned on her heel and left... but didn't even complain. One of my finer moments of sticking it back to the assholes who bring it.