On a Centos 6.6 box I noticed this...
[root@abcd /]# usleep --help
Usage: usleep [microseconds]
-v, --version Display the version of this program, and exit
-o, --oot oot says hey!
Help options:
-?, --help Show this help message
--usage Display brief usage message
[root@abcd /]# usleep -o
oot says hey!
While the man page doesn't mention it...
OPTIONS
--usage Show short usage message.
--help, -?
Print help information.
-v, --version
Print version information.
So, why does oot say "hey"?
Edit: Certainly this is an Easter egg, but it seems like it might be one with a story.