You know how, back in the day, you'd be chugging along at Tetris, and then out of nowhere it'd give you, like, eight cubes in a row when all you need is a straight line? To do that one better, here is Bastet, or Bastard Tetris, a version which does it on purpose using "a special algorithm designed to choose the worst brick possible." The Linux original was Slashdotted years ago, but now we have a web-playable version of this dude's port, in handy blogpost format. It's a little glitchy but the amusement factor was worth it for me. Try it - it sucks!