Years ago Dennis Spence told me that he was driving down my lane when a hawk dropped in the road ahead of him.  He got out of his vehicle to look, and found the hawk with a weasel in its talons, and the weasel had a death grip on the hawk's neck.  Both creatures were dead.

The hawk had dropped on its prey, lifted off, and climbed high in the sky.  The agile weasel had twisted around until it could grab the hawk by the neck.  Both may have been dead before they hit the ground.

I recently asked Dennis to repeat the story, he denied having ever told it.  Either his memory or my memory about who originally told the story is at fault.  Instead, he gave me the following as one of his most interesting observations:

He was watching eagles on the Snake River.  Eagles will eat until they're barely able to fly, then go roost in a tree until their meal digests.

Seagulls have figured out that if they harass eagles that have recently fed, the eagles are forced to disgorge the contents of their crops to get rid of the excess weight so that they can fly away from their tormentors.  The seagulls then help themselves to the eagle's meal.