Here are a few styles:
<> !*''
^"`$$-
!*=@$_
%*<> ~#4
&[]../
|{,,SYSTEM HALTED
A poem can be appreciated only by reading it aloud:
Waka waka bang splat tick tick hash,
Caret quote back-tick dollar dollar dash,
Bang splat equal at dollar under-score,
Percent splat waka waka tilde number four,
Ampersand bracket bracket dot dot slash,
Vertical-bar curly-bracket comma comma CRASH.
: http://babek.info/libertybasicfiles/lbnews/nl123/fun.htm