In Super Mario World, if you make the right series of moves with the right game objects, you can cause the game to execute arbitrary code. A particularly delightful use of this feature was recently shown by Masterjun, a tool-assisted speedrun enthusiast. He unveiled the speedrun to the world using an unmodified game cartridge and a Super Nintendo Entertainment System with eight controllers connected through a multitap system at the Awesome Games Done Quick 2014 event. Hack A Day explains the technique. Masterjun explains it in more detail.
Remember playing Super Mario World on your Sega Genesis? Probably not, considering it's a rather rare bootleg. Well, thanks to the efforts of some determined gamers, you can now play it at home, although only on the Gens Plus GX emulator on the Wii (or through the Gens core via RetroArch.) [via]
SMW - The complete soundtrack to Super Mario World, covered by one man using dozens of instruments. Roughly in game order, faithful to the originals, with some bizarre artistic license thrown around. A private hobby made public. Dedicated to Koji Kondo.