I had my worst ragenight yesterday in Dark Souls, being the Arrogant prick that i am i thought i can just run through the game without having to care in my 2nd run on the char i wanted to build. 50 lvls later a bit forest covenant grinding, It went well until Anor Londo till I failed at the Dark Knight Archers 3 times with great White phantoms at my side since i usually struggle at that part of the level for whatever reason. My Rage Level was at 200 at that point since i failed 3 times with 2 other people in my lvl, thus failing them as well in the process (somehow that makes me even more angry). All a matter of my own arrogance in taking the mobs for granted and just slip through.
After i lost another 30k Souls later on my Rage Level exploded. Pressed the Xbox Button and Shut down the console immediately for the first time in my 80 Hours i invested so far int he game.
Outcome: The Save got corrupted, my Char (my 2nd char) is gone now since i gave into the childish emotions while the game obviously tried to save. The Game can crash and that will eventually corrupt your saves anyway if you're unlucky, but never push your luck by Ragequitting that way yourself. Dont be an idiot like me. Kill a kitten, or slap your girlfriend but never touch that Powerbutton.