Ouch!! BTDT a time or two, although with a cow, not a bull. (Doesn't make much difference... if 1200#+ of bovine is pissed off at you, it hurts!)
Amazingly, I walked away from all three serious incidents, although it took 8 stitches to close the gore wound on my thigh... missed the femoral artery by less than 1/2", and if she'd hit it, I wouldn't be here to write this.
The cow who tossed me 10 feet into a thorn bush came after me and landed on top of my back with both front hooves and her head. I have no idea how I walked away from that one... had some nasty bruises and scrapes on my ribs, and one elbow blew up to about the size of a softball, but was only bruised.
Summerthyme