There are a few ways to make trapdoors, but out of all of them, this one is my favorite. It's fast, completely hidden, and both opens and closes. This particular trapdoor can be used for a variety of purposes, such as hiding your valuable possessions, having a secret entrance to an underground lair, or maybe even taking care of obnoxious cows. What you'll need to make it are 12 sticky pistons, 8 redstone repeaters, 32 redstone, the switch of your choice, and whatever blocks you want to use to...