Foot in mouth with customers

So we have the Stupid customer thread and the Rude customer thread. All this made me think of the times I've stuck my foot in my mouth to a customer.

My favorite one is the time I had a customer come in and wanted his ankle band tattoo repaired. It was a barely there mess, I told him about $120. He said "$120? I only paid $12 for it." He then proceeded to tell me that he got it at Rainbow gathering (kinda like burning man, in the woods) Some guy did it in a tent with a battery unit. I'm still curious how clean this could have been. He then got a sunburn on it that day and later that night he soaked in a sulfur hot spring.
I looked at him and told him he did almost everything he's not supposed to and he's lucky he didn't get a major infection and lose his leg. At this point his friends begin laughing hysterically. He then raised his other pant leg....... His other leg was a fake!!!!! His buddys then began to tease him, dude you better take care of that leg, it's the only one you got. Maybe you should just put stickers on the fake leg, it's cheaper and you can't screw it up.

I felt really stupid, how was I to know?

My other big one was the time the guy asked for a price on lettering and when he said he couldn't read the price sheet, I said "If you can't read why are you getting words"

Somtimes I have to remember to stop and count to 10 before I say what I am thinking.

One time when I was really tired I told a person that they're ID was expired when it said the experation date was in 2004 (this was last year). I tend to forget what year it is when I'm tired. D'oh!

may i make a suggestion?

The most awful I have ever felt while working....

I was working at a Tobacco Shop and this nice old lady came in. She was one of my regulars and we would always chat for awhile whenever she came in. She always bought the same two brands, a carton of each. This one time she came in and only had one carton. I asked why she wasn't getting the other kind. She then told me that her husband died two days before. I felt so fucking awful, I mean, it's not like I knew, but still.