I've had a similar experience, kinda. I wrote a little script once to move some files and folders up a level, just to tidy up a tree structure. Ok, so it was my 'prawn' collection, even gals got needs...

Unfortunately I ran the script from the root on C drive. It got carried away and re-iterated itself and ended up moving every single file from every single folder right up to C:

Oh how I laughed....as I formatted my PC and reinstalled everything. I'm sure there are multiple lessons to be learned there....

p.s It must be annoying when you write a good article and all the replies you get are "single word, now please upvote my comment in return"