Heavy
I love this argument by Avram Grumer that purports to solve the Can God create a rock so large he cannot lift it? paradox. (Summary: Sure he can! Just have him whip up a universe containing nothing but a single unit of molecular carbon, or some other smallest-possible-"rock" of your choice. No matter how you move it around, it will be the gravitationally lowest point in the universe, and therefore unliftable. QED.)