Temp Folder Fuck
This situation occurs when a user saves a document to a temporary folder and edits it without realizing that the computer they are using wipes all temporary folders every second or so. They then save their file which, in the best situations, they have worked on for hours and find out the file no longer exists.
Dude WHAT THE FUCK! I just saved my file, and I forgot about the Temp Folder Fuck, I JUST LOST 5 hours of work! Goddamn it!