Blood on the Saddle's a bit longer - I think I got in from Sing Out:

There was blood on the saddle,
And blood on the ground,
And a great big puddle
Of blood all around.

The cowboy lay in it
All covered in gore,
And he won't go riding
No broncos no more.

Oh, pity the cowboy,
All bloody and red,
For his bronco fell on him
And mashed in his head.

There was blood on the saddle,
And blood on the ground,
And a great big puddle
Of blood all around.