In our university's orchestra, I'm playing principal horn, and the assistant principal is the freshman Alex (not his real name, but lets go with that). As principal its my responsibility to be the musical manager of the other horn players, so I've got to make some musical decisions and shape the horn section to a certain artistic vision, to an extent (unless it goes against the director). In addition, Alex being a freshman and I being like 7 years older than him (oh geez...), our relationship is a little more mentor-ish than usual. But were really on great terms, he seems to really look up to me.
Well, I have a lot of musical opinions, so I'm constantly leaning over and whispering things in his ear things like "shorter!" and "lead to the downbeat." (If you don't understand musical terms, its not important) Well, a couple days ago he was playing a part and took a breath during a crescendo, and I leaned over and told him "You can NOT break that crescendo." I was using plain language for emphasis, but I realized that it came across as angry or harsh, so I tried to pass it off with a shrug. Then I realized that the shrug seemed really sarcastic and nasty, and I was just mortified coming across as this nasty disagreeable person, and I saw his face looked pretty bewildered and nervous.
Usually in these situations I've convinced myself that I've completely ruined the moment with my awkwardness, that there's no going back, nothing you can say anymore that will fix it. Well, I sat and stewed in my embarrassment for about 30 seconds, but then I just thought about my words for a minute, then said to him "Sorry, that came out wrong, I didn't mean to sound so harsh." He gave a laugh of relief and told me he understood, and everything was better
Moral of the story, there's few verbal mistakes you can make that can't simply be talked over. Otherwise, I mean, I can always feel guilty about pursuing music on the slim chance I land a real orchestra job, when a real career would be a sounder life choice, but... I try not to think about that too much.