Actually, this doesn't allow that. Now normally I wouldn't get picky, but since I made dropping ACTUAL piano's on people an option, I thought I should go ahead and point you to the appropriate thread. It also includes bricks, adamintine treasure chests, anvils, and viking longboats. It also has the small benefit of almost certainly being better balanced than this.
Anyway, here you go: Falling Anvil a martial discipline.