I am pretty proud of myself, because other than my initial screech of "OHMIGAWWWWWWWWWWWD!!!!" I managed to not yell. The 16y/o ran out and immediately started picking up wet stuff around it (there was only half an inch of watered down iced coffee in the mug) while I got it out of the way and shut down. She already feels terrible and I'm hoping she has learned to knock off that jumping shit.
AFAICT, only a tiny bit got near the fan exhaust, and that's it. Didn't even hit the USB ports on that side. Now that I've calmed down, I'm hopeful.
And I live in a tiny village, the closest repair shop is an hour away.