48 FALLING BLOCK TRAP. Anyone traversing through this section of the corridor will set off this trap. A block of stone will slam down from the ceiling with great force, doing 3d6 damage. A saving throw versus paralyzation will ensure that the victim got out of the way in time, but each character in the first two rows must make the save (although characters in the second row save at +3). After discharging, the block will begin to automatically reset into the ceiling, being hauled up on a sturdy chain by a heavy counterweight. The sound of the falling block and the subsequent grind of the chain and stone will cause an immediate check for wandering monsters.