There are some highly entertaining examples on the net of command line program output, but it’s great when you’re doing some system maintenance in Linux on your own machine and a gem unexpectedly crops up:

:~$ sudo /etc/init.d/dovecot restart
[sudo] password:
* Restarting IMAP/POP3 mail server dovecot
Warning: Last died with error (see error log for more information): Time just moved backwards by 11 seconds. This might cause a lot of problems, so I'll just kill myself now. http://wiki.dovecot.org/TimeMovedBackwards

NO! Please, it’s not worth it! :)