October 18, 2012 11:20
The scariest thing I've ever done in Linux:

# mv /lib/* /usr/lib/*
# ls
-bash: /bin/ls: No such file or directory
# echo SHITDAMNITOOPSCRAP
-bash: /bin/echo: No such file or directory
# /usr/lib/ld-linux-x86-64.so.2 --library-path /usr/lib /bin/rm /lib -r
# /usr/lib/ld-linux-x86-64.so.2 --library-path /usr/lib /bin/ln -snf /usr/lib /lib
# ls
bin  boot  dev etc  fastboot  home  lib  lib64  media mnt  opt  proc pts  root  sbin  srv  sys  tmp usr  var