Roger considered that, and then turned and looked at one of the nearby pillars.

"Hey. How hard do you think a gorilla could swing this?" he said, indicating the sledge on his back. "It's got kinetic energy storage and release mechanisms built into it. Give it a few good swings and by the time you make impact it'll come in with three or four times the force of your actual swing. If he can't cause a cave in, I'd bet you could."