I've felt some secondhand embarrassment from a bunch of my friends when they're presenting stuff in class. I try to get in their groups and carry the presentation as much as I can (I really, really like presenting) but there comes a time when the other chumps have to speak.
I volunteered to be a part of the crew for theater and then I learned I had to be an extra on top of that, and I probably did some goofy stuff up there but nobody ever said anything and I'm p sure nobody was paying attention to me anyway because no one ever mentioned it to me.