I have a few.
I was working at a communal snack bar with Mercury a few summers ago. We had this crazy stoner lifeguard who would always come up to us and order things in weird ways. Once, he came up to the counter and demanded “wa-wa.” Recalling some biography I had read before, and without turning around, I said, “Who do you think you are, Hellen Keller?” As it turns out, a frequent customer, who was also deaf, and her husband were standing at the counter. I don’t know if they heard me (well, I know she didn’t!), but it was not a good situation.
After that, we went to a concert at Marywood. It was just the usual student recital thing, and they were playing Christmas songs. Well, this guy with a saxophone was led onto the stage by a few other people, and he started wailing away. Of course, he was really, really good, or else he wouldn’t’ve been at Marywood. Anyway, I started thinking, “You know, for a retarded guy, he sure is good at playing the saxaphone! He must be a savant!” As he was led off the stage, it occured to me that there was only one retarded person in the room, and it certainly wasn’t the blind guy exiting the stage.
Another time, a friend was playing some game as part of a Coaches vs. Cancer event. I walked right up behind him and said, “Ha! Coahes vs. Cancer! What an unfair match- I mean, come on, of course cancer’s going to win, cancer always wins! Cancer kills people, man! Do coaches kill people?” Immediately thereafter, I had a flashback to when I was sitting on this guy’s couch just after I’d met him; he’d gone upstairs, and someone whispered to his girlfriend, “Steve’s mom died of cancer, right?”
On the bright side, the only thing that makes that comment funny is the fact that I screwed up so badly.