Minecraft wiki entry for Pillar_jumping, associated text: Pillar jumping (also known as pillaring, chimneying, towering, jump stacking, nerd-piling, nerd-poling, piling up, or constructing a block elevator) is a method of reaching a higher altitude that can't otherwise easily be reached in a map. The pillars serve only the player creating them and are useless to others, unless a ladder is later placed on the side.