It's surprisingly difficult to keep a straight face when reporting bugs related to "going to hell". Anyway.
When I got to Hell, I ran around for a little while trying to figure out what to do, and eventually asked for help on the help channel. Then, a few minutes after I'd squished all my grapes and been resurrected, the floating rock popped up with some advice about how to get out of Hell. It also gave me a quest, squish ten grapes and get resurrected, but as I'm now back in the land of living, there's no way to complete that quest. (Short of dying again! Which I think I'll try, just to see what happens.)