This page is dedicated to humorous versions of Tetris.
A combination of Tetris and the game Portal. When a piece reaches the bottom of the playfield, instead of it being placed where it lands, it enters a portal and reappears at the top, thus making it impossible to get past the first piece.
The bottom of the playfield is rounded, making it very difficult to place blocks in a manner so it'd even be possible to clear a line.
A game by Stabyourself. Instead of there being the traditional four positions the pieces can be in, they can rotate 360 degrees.