Minecraft traps

Materials: 3 netherrack,
4 cacti,
4 sand,
and a fire source

Dig a trench of seven blocks. The width and depth is one block. In the trench put sand at each end. Then after the sand put netherrack. Then sand and in the very middle put netherrack. Place cacti on the sand blocks and light the netherrack. A mob will jump in the fire and bounce out into the cacti and die but protect the loot.