I saw this
http://www.toodarkpark.org/computers/humor/shoot-self-in-foot.html
and this one is nice
UNIX
http://www.toodarkpark.org/computers/humor/shoot-self-in-foot.html
and this one is nice

UNIX
Code:
% ls
foot.c foot.h foot.o toe.c toe.o
% rm * .o
rm: .o: No such file or directory
% ls
%