Much like how the banana has been specifically created by God to fit the curvature of the hand, I'm now of the opinion that apples were specifically created to be thrown in the air. A good apple has the perfect ratio of size (graspability) and weight (feels hollow yet heavy) to deliver the ultimate "oomph" when tossed in the air and caught back. Make sure to put some backward spin on it with your fingers. It's an incredibly satisfying sensation.