Minecraft Traps

As I said I am making these daily. To save time I'm only going to post one picture. It will be of the finished project. This trap is a piston suffocation trap.

Materials: 2 pistons
sand (any amount)
redstone
pressure plate (optional)

First, dig a hole. It should be 2 blocks long and 1 block wide. Dig however you want. At the bottom, place the pressure plates. Next to the hole, place the pistons. They should face the hole but when they extend, they shouldn't pass the hole. Wire the pressure plates to the pistons. In front of the pistons, place the sand. So, when someone walks onto the pressure plate, sand falls on them and the suffocate.