The Down Block is a block that moves a player downwards. If you touch it from the left or right side while you are standing on a block, it will stop you from jumping. If you touch it from either side while in midair, it will launch you downwards very quickly. If you jump up and touch a Down Block from below, it will push you downwards. If you stand on a Down Block, you will not be able to jump. You must escape using a Superjump.