ball-throwing machine

What makes a dog really happy? The dogs I know are happiest when someone throws them a ball or a frisbee. Jerry, the dog in this video, is happy because he has his own ball-throwing machine. Yup, no more waiting for a human to throw the ball. Jerry just set the ball in the launcher and he has hours of endless fun. Look how happy this dog is. Do you wish you had a ball-throwing machine for your dog