How to reboot a hung up Linux gracefully
In those rare cases, when your Linux has utterly hung up on you an nothing, not even restarting X seems an option, you can still tell your system to reboot as gracefully as possible, through the following esoteric procedure:
Press Alt (not AltGr) + Print/Scm/SysRq and hold those two.
Now use your third hand to enter the following letters in the exact order presented here:
This will force Linux to write everything it still can to disk, unmount and reboot, perserving as much of the current OS state as possible.
Remember the characters via this nonsensical rhyme: Raising Elephants Is So Utterly Boring. ;)