Cows

I heard a story from a college classmate that runs as follows:

My brother and a few friends were goofing off one summer day at the Yakima river, jumping off a bridge into the water.  Well, they were having a great time, that is, until my brother jumped off the bridge and landed on a dead, bloated cow that was floating down the river.  Unfortunately, that wasn't the worst part of it.  He got stuck knee deep in that cow.  He lay on his back in the water, his legs bent and cow-ey, flailing his arms in the air, until his friends were able to swim to him and pull him out.