I saw a peregrine falcon chasing off a much bigger red tail hawk... they were both squawkin' at each other hard - that falcon wasn't taking any chitz!!
I saw a small hawk do a low dive, on a squirrel... Unfortunately, a passing car on Highway 101, actually deffered it, off the hunt, hitting the windshield... It was, pretty awesome, watching the bird, hitting the windshield..and still surviving....