Minecraft wiki entry for Pillar_jumping, associated text: Block jumping is similar to pillaring and also referred to as "block glitching", which is an easy way of traveling upwards. By block jumping, the player can easily reach very high places by jumping and placing a block underneath the player's feet while airborne. Block jumping is a form of glitch movement involving high connection pings or high lag rate, and is used as pillaring on multiplayer mode in areas the player cannot build in.