Ok, ton and an half, at 1d6 per 200 pounds, definetely maximum falling distance for x20 multiplier, that's 140d6, right?
Normally you would get a reflex save to try to dodge falling objects as per heroes of battle, but since this game is delayed enough, the halfling doesn't have any surface to try to jump away from, and rule of cool, I'll say he takes the damage directly.
Rolled 20d6 : 3, 2, 4, 2, 5, 4, 5, 6, 2, 6, 4, 3, 1, 5, 3, 5, 3, 6, 2, 1, total 72
Rolled 20d6 : 6, 5, 5, 1, 2, 3, 2, 3, 3, 3, 3, 5, 5, 1, 2, 2, 1, 5, 6, 1, total 64