I have Falcons around my yard. I've seen them swoop down and pick up snakes and critters. Every once in a while I'll be in the back yard and one will be in a tree, or come swooping in and land on a tree and stare at me and it feaks me out.
That being said - a Buffalo tramples a Falcon no contest. Esp with a helmet and visor so it can't eat your face. GO BILLS