That's a performance they won't forget

Could have been worse I don't know how but it could have been worse

Yep. A giraffe could have run into the room closely followed by a hungry lion in pursuit of its delicious prey. The lion then could have abandoned the giraffe as the cheering second graders would look more delicious and much easier to kill. To save them, OP would then start banging hard on the drums and pianos, thereby opening a portal to a new universe. Then everybody gets sucked in and lost forever in an alternate universe.
It could definitely be worse.

You get a thumbs up for the efforts you took

I was at a Christian camp once and the guy was doing various funny walks and started doing a Nazi Goosestep without realising what it was in front of hundreds of 14 year olds. He had to apologise later. it was fine.

They might not even know what it means

Which definitely means they won't ever try to repeat it, because second graders are rational thinkers, who only use words they understand.

I smell a bit of sarcasm there...

You're just introducing them to the real world. a little early, perhaps, but hey. Give it 5 years and they'll all be cussing like sailors

I never saw the big deal behind swearing anyways, in most cases it's just a way of expressing what you're feeling; in OP's case: pain. My parents taught me swear words at a young age, but also taught me how inappropriate it can be and when not to use it.
I'm one of those who think that educating is more effective than just sheltering.
Granted, when they are at an age where they can understand it.
I wouldn't sweat it OP. Plus, it's not like you meant it.

I wouldn't be surprised if they were already cussing like sailors. Kids these days are not like those of the millennial generation. They've become spoiled brats, with exceptions of course.

well, the kids that rode my bus back in high school (k-12 school so shared a bus) were cussing like sailors and they were only in 3rd grade. I will assure you we older students weren't the cause as we refrained from those things. it was kinda pathetic how they were raised that way

If you apologize to the teachers I'm sure they won't be to upset. Maybe don't ask them to be a reference though hahaha!

oh wow....that sucks! hope you didn't yell it out too loud

If it's anything like here, they've been swearing for years already anyways.

Play it off, quite literary.

eh, they probably heard that already. and worse.

Well I'm sure your playing was great, though it may have been over shadowed by the profanity. It was a mistake , it happened now it's a good story. Life goes on.