Here's something to think about: A dog was chasing 2 kids to attack them, one fell to the ground and the other kept running. The dog kept chasing the running one and passing by the one that fell. He attacked and bit the kid that was running.

Dogs for example, have an instinct to hunt on things that run. Plenty of my friends have been bitten while running. I always start walking when I see a dog, and never been bitten.

Don't underestimate instincts in both humans and animals.