If you have an application open, Alt+F4 will shut it down. If you do not have an application running, it will shut down the computer.
Lemon Demon aka Neil Cicierega.The video was animated by AltF4 aka Shawn Vulliez.
"The Ultimate Showdown" was posted to the AlbinoBlackSheep website on January 6th of 2006 by Canadian animator Shawn Vulliez, under the alias "AltF4".
To input codes in the game Tornado Jockey, you can press Ctrl + Shift + C on your keyboard to open the cheat console. Then type in your desired cheat code and press Enter to activate it. Some common cheat codes for Tornado Jockey include "WindWard" for extra tornado power and "AltF4" to instantly complete the level.