It's some sort of big... masher??

As you make your way into the following room, you hear an eerie humming noise coming from overhead.

As you walk into the cylindrical chamber, there's an obvious open door on the other side, but above you, there is a large, blunt rubber looking ceiling. Peculiar...

Suddenly, the humming noise is replaced by a whirring, grinding noise, like machinery gearing up,,, after another moment, the sound of a pneumonic hiss, and then that rubber ceiling starts looking like it's coming at you mega-fast!!

What the hell!? The previous room seemed like it was bereft of traps, and now this room is... seemingly just trying to kill you?

Oh well.. no clever plans this time... just head for that door before you're squashed!