Any good explorer knows there's more to it than meets the eye.

[He pops open a nearby fuse box and flips one of the switches near the bottom. The wall slowly slides away, opening into a dark corridor with a few fluorescent lights strung along it]

This will get us out by some bushes near the commons, but we'll have to be careful. I think it's primarily used when the professor needs a bit of a tonic after dealing with us kids for too long.