One thing that's always bugged me is that the Black Rock took out the statue and then landed half way across the island. That must have been one hell of a wave!
The Richard episode showed the Black Rock coming to shore and heading down, i believe, as it whacked the statue. Seems hard to get that far inland when you were that low at the statue.
I also find it hard to believe that the black rock destroyed the statue. That thing was solid rock and the boat wasn't big enough to reduce it to a single foot. Now, the storm could have wiped the rest of it out I suppose...