Memories that make you go

Simply put, share something that you did that makes you feel dumb just by remembering it. I'll start, and damn this hurts to remember.

I was 16 and in high-school, was awkward as hell and I didn't know a lot about the tricks or jokes that were common among the other kids. One day in drama class, cause someone could play better music and paint a better picture than me by blowing paint out of a trumpet, we were playing a game and I was next.

The game was simple, one person acted out doing something and someone goes up and helps them. At the end the first person tells the second what to act out next and sits back down. Anyway the person I was supposed to help was told to lick her elbow, and I had no idea this was a thing so I was just plain confused, and I stood there for a bit. No idea what to do.

So I did the obvious, try and lick her elbow for her.

She moved away before I could close when she realized what I was stupidly trying and sat down without giving me my cue. Whole class laughed and the teacher had to remind her. No one made an issue of it but god do I hate myself when I remember it.