Dreamed I was playing for a crowd of parked cars

I'm busking on a corner I don't recognize, and every car parked down the block has its windows rolled down like they're listening. Not a single person around, but the cars are swaying — that's the impossible part, they swayed — and when I hit the last chord they all honked in unison. Woke up grinning and told my guitar about it. That's the whole thing, but I still think it means my corner's out there somewhere.