Appearing Blocks (出現ブロック,Shutsugen Burokku?), also known as Bun Blocks (ブーンブロック,Būn Burokku?, "Buzzing Blocks", also written as ブンブロック), Tenmetsu Blocks (点滅ブロック,Tenmetsu Blocks?), Vanish Blocks, or simply Blocks, are recurring obstacles in various Mega Man games, notably the original Mega Man series. Appearing Blocks are temporary platforms which appear and disappear in a specific pattern at a set interval (usually one second). The player can stand on them while they are solid. Groups of them form block patterns which often require memorization to pass and are considered some of the hardest obstacles required to pass without using special items or Rush. They are usually found with hazards such as spikes, enemies and bottomless pits.