Not really on purpose. Just imagine the situation, let's say a cat is running through the road. You don't wanna kill him and you can't change direction because a lorry is coming in front. On the right side there's gravel, then lots of trees. What would you do? It's not worth crashing the car, or getting deadly injuries. This is what I meant, not " omg there's a car let's give more throttle to drive over it."
Well of course I'm braking, but it happens so fast that it doesn't help. When you look into the mirror, it's too late. Depends on the situation really, how far the animal is, etc etc.. we could discuss it all day long.