Waka Waka Poem
First, the poem itself (there are many versions, this is just one):

<> ! * ' ' #
^ " ` $ $ -
! * = @ $ _
% * <> ~ # 4
& [ ] . . /
| { , , system halted

In English, this reads:

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 tilda number four
ampersand bracket bracket dot dot slash
vertical-bar curly-bracket comma comma crash