When I was getting my CS degree, in the first year (2003-2004) all projects had to be delivered in an envelop containing the printed document and a floppy disk with the code/program inside. Yes, a floppy disk.

So whenever I couldn't finish the project on time, I just dropped a corrupted floppy disk on the envelop, this way I got at least one more week to work on the project and when professor came to me like "Hey, your floppy didn't work" I was like "no way! oh man, I think I have a copy here, try this one instead".

Oh those good old times that will never come back.