Now that's a funny story. Funny in that it didn't happen to me.

The only relief against capsaicin (in food) I know of is rinsing the mouth with common alcohol, ala vodka, then (sadly) spitting it out. It's not water-soluble, so the usual heat "remedies" don't help, other than ice or cold water reducing the burn sensation.

Externally, it's the old soap and water routine.

Far too much here:

Capsaicin fact sheet

Cheers,