Here is another installment of exTRAPaganza, our Thursday over-the-top trap series.
The floor in this room is springy. A large boulder, set into the ceiling falls into the middle of the floor, projecting the party upwards into the spiked ceiling. Once the party hits the ceiling and falls, they will notice that the floor has collapsed, revealing a pool of lava 100′ below. At least the spike wounds will be cauterized.