I remember the day when I mistakenly hit :
# rm -rf /
instead of :
# rm -rf ./
The . changed my day that day. Thank god that the files and configs in the server had a backup in my PC. :P

I just tested a VPS and it was kind of impressive: I just had shared hosting until now and it is a total difference when you're having full root access.
Kind of hating these greedy shared hosting fuckers now ;)
Because it was just for testing purposes, I wanted to try the mysterious command "rm -rf / --no-preserve-root".
It was working for around 5 minutes and after that literally no command worked anymore!
Not even reboot worked :P
Then I tried reboot it via the VPS panel :) End of the story: vps panel chrashed with error message: unable to start vps :P
I thought it was kind of funnny and nice to share & thanks for reading 'til here!