Try and leave!

Ew! That thing's perverted. You're not getting on it ever. You turn around, and try to open the door. But there's no handle on this side. You lock at the lock mechanism, maybe you can wriggle it open anyway? It looks like most other cublicle locks.

But it doesn't seem to be working. It's too small and fiddly.

*pshhh*

You hear strange noise. It sounds a little like an aerosol being used. then you feel a few cold droplets on the back of your neck. Standing up and turning around, you can see a pale mist in the air. It smells odd, slightly clinical. And you notice you feel kind of tired. Very tired, in fact. So tired you could just nap right here. Maybe that's just what you'll do.