I have a few embarrassing moments, too, and they're all related to my being in the service.
The first one needs a little background: I was in ROTC during my bachelor's and we had a shortened version of basic training in the summer. Now, while you're there you run on so little sleep that a few strange things begin happening. Firstly, you start to forget how tired you are. Every time we sat down for more than five minutes at a time, we fell asleep. And, most importantly, you learn to catch sleep whenever you can ... sitting through a briefing, a nap standing on the parade grounds, and even dozing off during our formation runs. Yes, I learned how to fall asleep while running in formation -- and not getting out of step or falling out of formation!
OK, so for embarrassing moment #1: the school year following my summer training, I started working out with the Army ROTC unit at my college 3 days a week. We met and worked out at 6 am and they broke us into groups for running. I was in the slow group. Anyway, since my college didn't have a track, we ran inside the big sports complex around the backside of the bleachers, where the food stalls and stuff are set up during an event. It was just short of a quarter mile for one lap. One morning, while running with my group, they followed the path as it curved ... and I did not. I kept running straight ... straight into one of those vender carts, bounced off onto my butt and was back up on my feet running again (and now wide awake). Meanwhile, our instructor and the rest of the class stopped and stared at me and, when they realized I hadn't a clue what had just happened, laughed their butts off. Nowadays, I'm pretty sure that moment would've been captured on youtube. Thank heavens for small mercies!
Another time, later on after I was commissioned, I was playing an intramural frisbee game and got called foul multiple times in the same game for "tackling." Or, as I was repeatedly reminded, "Frisbee is not a contact sport." My team decided to get even with me by singing a song that had the chorus: "Fly like a bee, sting like (insert my name here)." I wasn't really amused, but the little song was picked up by everyone by the end of the season. Besides, I was not tackling -- they ran into me!
I can also cite the time following my hand surgery when I tried to salute my colonel (my arm was in a cast) and whacked myself in the face. He heckled me about that for ages. Oh, the memories! Funny how we can laugh about them now!