I never got those specs. Therefore, I must assume that the rocks are highly light, highly strong, manmade rock alloys (which happen to be bulletproof and your exact shape). Pick one up as a shield, walk off screen, and walk home. There.
If you try to disqualify this due to unreal conditions and/or object properties, I will be forced to point out that it is extremely unreal that you cannot tell things about rocks with, oh, I don't know, the set of eyes that come standard on most people.