Looking for man pages inside synaptic, i found that interesting package: funny-manpages. It has some man pages for well-known commands, like rm, echo, date, and has some new commands, like baby, party and even rtfm!
For debian based distros, it’s enough to do: apt-get install funny-manpages.
Some man pages available after installation of above package: (try them with man <command>)
…etc (To show the complete list: dpkg -L funny-manpages)