impenetrable shield?

durring a recent football game a lineman accidentally stepped on the screen of my ipod video with his cleats on and cracked the screen. :eek: Is there a powerful case that would prevent the screen from cracking if someone stepped on it again?
I imagine that an Otterbox case could. Mine used to fall onto cement and asphalt numerous times without incident. It only did minor damage to the case after a while. Plus, it's waterproof.

www.otterbox.com