When I was 13 I wrote a C program that wrote random data to a file. I had the idea to try executing these files. Most of them did nothing, but I remember that one did end up causing the printer to print out pages of gibberish.

Years later I found myself wondering how that even worked in the first place. Surely the chance of generating a valid executable was basically zero. Now I know why.

I wish I had kept that executable, it would've been interesting to disassemble it.