Neat picture!
Cats, including big kitties like mountain lions, don't like to attack things that are aware of them, especially if the "thing" is big enough to resist. My outside cat will kill rats and ground squirrels but only the ones that he can ambush and get by the back of the neck. If they see him before he pounces, he waits for a better opportunity.
Cats, even the big ones, always try to kill by asphyxiation, not by tissue trauma from their claws and teeth. They get their prey by the back of the neck and clamp down on the windpipe and the blood vessels that supply the brain. This cause the prey to lose consciousness quickly and avoids much fighting back, with potential injury to the kitty. Staying on top of the food chain involves planning and caution.... (Probably why we are there, too).