Here is one.....I put a little twist to it at the end but the rest is not mine but from LOTR The Riding of the Rohirrim:
From dark Dunharrow in the dim morning
with thane and captain rode Thengel's son:
to Edoras he came, the ancient halls
of the Mark-wardens mist-enshrouded;
golden timbers were in gloom mantled.
Farewell he bade to his free people,
hearth and high-seat, and the hallowed places,
where long he had feasted ere the light faded.
Forth rode the king, fear behind him,
fate before him. Fealty kept he;
oaths he had taken, all fulfilled them.
Forth rode Théoden. five nights and days
east and onward rode the Eorlingas
through Folde and Fenmarch and the Firienwood,
six thousand spears to Sunlending,
Mundburg the mighty under Mindolluin,
Sea-kings; city in the South-kingdom
Doom drove them on. Darkness took them,
horse and horseman; hoofbeats afar
sank into silence; so the songs tell us.
So Théoden rode forth to battle the besiegers, but a dart from the black riders lord, fell his trustworthy, loyal horse Snowmane...Snowmane became his master, Théodens´ bane.
How do you like the ending? I made it myself but I am not a good poet...:D
Life's a piece of sheit, when you look at it
Life's a laugh and death's a joke, it's true
You'll see its all a show, people laughin as you go
Just remember that the last laugh is on you