Human Tetris

Brain Wall (脳カベ, Nōkabe) is a component of the Japanese variety show The Tunnels' Thanks to Everyone. Video clips from the show proliferated on video-sharing websites and the concept was eventually adopted by several other countries. It became popularly known to non-Japanese speakers and YouTube fans as simply Human Tetris or Hole in the Wall, named for its involvement of the physical body and a supposed close resemblance to the rules of the video game Tetris.