I heard this really Hilarious Poem from one of my classmates

There was once a penguin who could fly
Every other birds sent their own spies
When the penguin flew, a kiwi tripped
The wings tore and ripped
guess you wish you weren't that
cuz that penguin died in a "Splat"

Or...

There was a kid named Joey who thought he was a hero
All I thought was he was a zero
When he kept trying to fly
He always seem to pass by,
always stomping on my foot,
Giving that annoying "Woot",
One time he went to the roof
He tried to jump saying he'll disappear like "poof"
Everyone gathered around him
I pleaded to come down but it was dim
He jumped and fell
Everyone yell,
There was a Event today,
Even poor little Cast-armored Joey,
came today.

My favorite is in French, it was written by Emile NELLIGAN (1879-1941):

Le vaisseau d'or

Ce fut un grand Vaisseau taillé dans l'or massif:
Ses mâts touchaient l'azur, sur des mers inconnues;
La Cyprine d'amour, cheveux épars, chairs nues
S'étalait à sa proue, au soleil excessif.

Mais il vint une nuit frapper le grand écueil
Dans l'Océan trompeur où chantait la Sirène,
Et le naufrage horrible inclina sa carène
Aux profondeurs du Gouffre, immuable cercueil.

Ce fut un Vaisseau d'Or, dont les flancs diaphanes
Révélaient des trésors que les marins profanes,
Dégoût, Haine et Névrose, entre eux ont disputés.

Que reste-t-il de lui dans la tempête brève?
Qu'est devenu mon coeur, navire déserté?
Hélas! Il a sombré dans l'abîme du Rêve!



Source: http://poesie.webnet.fr/lesgrandsclassiques/poemes/emile_nelligan/le_vaisseau_d_or.html

That poem is just way too smart once you start to analyze it. Positive and negative words are perfectly placed and mixed.