I ran this one recently.
A large room, with sloped ceilings and a tiled floor with a chessboard motif in white and black. Something can be seen lurking within the white tiles. The black tile opens the the three closest white tiles which have stirges trapped within, ready to attack.
Meanwhile, on the far left of the room is a lever, which when pulled rotates the room so that the floor becomes the ceiling (and releases all of the stirges) and the ceiling becomes the floor. And the exits are now high above on the walls.