Not a bike story, but I was going for an out-an-back run once with my dog (he was a border collie mix, I only had him a brief while, but exercising him kept me fit) and stumbled across about a half dozen turkey vultures surrounding the carcass of a squirrel/gopher/rodent of some description. We paused. We looked at the vultures. The vultures looked at us. We carried on.

We passed back through about 20-25 minutes later. The vultures were gone and all that was left of the rodent was a gleaming white spine and skull.