The answer to this question is unfortunately, it depends. If you hit a deer with your car it could very well jump, especially if it is startled. The best thing you can do if you hit a deer is to stay calm and assess the situation. If the deer is still alive and you can see that it is not severely injured, it is best to wait for it to move off on its own. If the deer is seriously injured or dead, you will need to call animal control or the police so they can remove the deer from the road.