From  GoldMidnight, Tales From Retail:

I'm a cashier at $Home Improvement store, and this morning I was watching self-check. Only the contractor's register was open, halfway down the store. I've been sick with a cold, and I hurt my ankle recently and it's still bothering me, so I admittedly wasn't in the best of moods this morning. I was also doing my best not to touch anyone's items because I didn't want to get anyone sick. Now, I had no trouble ringing people's items in if they were bigger, because I know it's a pain to trudge all the way down to the only open register when you're parked at the front of the store. But our self-checks are not hard to work, and I just wasn't in the mood to deal with any crap.

This guy (G) came up to me with an armful of small items.

G: Looking around "I don't like these self-check out machines, I need some help."

Me: "Okay, no problem." I lead him over to one of the registers. "I can walk you through it."

G: "No. I don't come here so that I can ring up my own stuff."

Me: "Okay. So you know, I'm sick, so do you still want me touching your stuff?"

It's worth noting that I looked sick and I sounded sick. I'd taken some DayQuil so it wasn't amazingly noticeable, but it was still enough for everyone else to be super nice and sweet to me. Not this guy, though.

G: Slammed his stuff on the little counter at the self-check register "I'm going to competitor's store! This is ridiculous! Thanks for wasting my time!"

As he stormed off, I called after him, "You're welcome! Glad I didn't get you sick!"

Our bookkeeper was passing by and asked what happened. I filled her in and she just rolled her eyes. Also, the closest competitor's store is about a half hour away. I probably came off a bit snarky when I told him I was sick and it wasn't intentional, but sure, let's yell at the sick cashier because she's sick and trying not to get you sick. Okay. Good thinking.

-- GoldMidnight