We were in Cullman, Alabama. Opal hit the wooden deck, that I had just built overlooking Smith Lake, with several trees. That night a huge boulder-sized rock piece came off the neighbor's cliff above the lake - but nobody heard a splash or anything! Divers never found it either when they were looking for something valuable that had been sitting on that section of the cliff. I think they found the valuables but the rock was ever seen again.
In PCB, Opal picked up enormous boulders from the Jetties and tossed them like so many pebbles across the peninsula into the bay. They are still there to this day.