>Look past fallen grate.

You pass through the bimped grate through a ventilation corridor, and see an open exit at the end--another grate bimped by the imp, shit you mean the mephit which is totally different.

Peering into the next room yields astonishing results. It is your room! But it's much bigger! Or rather, you are now much, much smaller!

You do indeed see the mephit. It is continuing to scamper around in search of ever-elusive egress.

>Fuck it. Befriend the mephit.