I pretty much cringe at every memory. Sad, but true.
There's the one where it was my first day at work, and I introduced myself to a man who then said, "Yes, I know. I'm the one who interviewed you for 45 minutes last Friday." (That wasn't too bad, in the long run. He's an engineer, and just as bad with faces as I am.)
The one where, at the same job, I pointed out that a poster of a chimpanzee resembled the CEO of the company. Well, it DID! I was told that that was an inappropriate thing to say. (In the Air Force, all we did was compare our "superiors" to various animals. It was expected. My mistake was saying it to the wrong person.)
Or, again at that job, I dressed up for Halloween. Apparently that's done in some kinds of jobs, but not others.
Or the time I told a supervisor that I had seen Billy Idol in concert, and that he had put the microphone down his pants and shouted, "I'm getting an erection!!" Apparently when you are having a casual chat with the boss, you are supposed to draw the line at uttering words like "erection." Again--in the Air Force, that's all anyone ever talked about at work. When the boss was in the room, the conversation was about erections. When he left the room, the conversation was about how much he resembled a hippopotamus. How was I to know the rules were different in civilian life?
There are so many. So many!