Interesting facts about the blocks: The place they fall down into, is a room filled with water. You can actually shoot into the room with two techniques. One, is that you go to the side of the room, and shoot through the window. Your bullets go through. Two, is to stand on the "blue" pillar, position yourself so the switch to end the level is to your left, and then shoot down. You should find the hole in the ground.
I think 2 more pillars are up out of the ground when you enter the room, but then they go down into the water. Bodies have no interaction with the blocks.