Minecraft Traps

This is also a suffocation trap.

Materials: A whole lot of booster rails,
a switch,
a mine cart,
redstone torch,
and lots of dirt.

Place the rails in a straight line. The length is really up to you. Place dirt at each end of the rails. Put the switch next to the booster rails. When you activate the switch all of the booster rails should light up. If not, replace those with normal rails. At the very end, place three booster rails or more and put a redstone torch next to them. Now, build a tunnel with a one block hole near the middle section of the rails. The cart should move through the hole. Now you're done. Activate the booster rails if a mob is on the rails. The cart will pick up the mob and the low roof should suffocate them. The booster rails will keep bouncing them around. In the picture, you can see a zombie in the trap. I got lazy and didn't make all of the rails booster. The glowstone was because it was dark and I needed a roof.