Yesterday I wished just to delete all of my songs on my MP3 player. How to do that? Simple.
rm -r *
The problem comes when, by mistake, your current directory is /.
I wasn’t so quick in pressing CTRL+C. The disaster! My file system completely blank!
I thought it would never have happened to me!
Why was I logged as root while acting on my MP3 player? Because I’m very stupid! 
That’s all.
