The Minecraft Piston mod was so popular that Notch and the Mojangles decided to add it to the base game. This video demonstrates the behavior of pistons as they will be included in the 1.7 update. There are some interesting new dynamics, such as the ability of pistons not only to push blocks, but to grip them and move them forwards and backwards. Piston elevators are something of a reality, as are movable walls. Also included: piston dams! Oh and hidden doors with stairs that fold out, then retract.