But back in my university days (holy shit I feel old, that was around 17 years ago), when flash drives were still new ish technology. I had installed a Linux live cd, which was a brand new idea back then, on my USB stick that also contained a bunch of my files.
I thought it would be a fun idea to rm -rf / to see what it would do to a live cd environment.
Then I realised it was not a fun idea as I started to see the names of my project documents being deleted.