Just as an added "story" --
We had a similar experience in 2002 on the Magic, but it was not because of a wave and not nearly to this extent. We were coming up to Deck 9 for our morning pastry and coffee at about 7 a.m. and as we stepped out onto the deck from the doorway, we realized we were looking down at the water. When we turned around and looked behind us, we were looking up at the sky. All of a sudden (and believe me when I tell you it was literally like slow motion), the jacuzzi dumped out all over the deck and chairs and tables started to slide. I turned to my husband and said I don't think this is normal and we ran back to our stateroom to check on our teenage daughter to see if she was all right. When we got there, she looked all upset and all of our items in the bathroom had fallen on the floor. The Captain came on and announced his apologies for the error and that no one was hurt. Apparently they were trying to shift from manual to automatic and the ship overcompensated. That night at dinner we asked our waiter about it and he said you should have been in the kitchen! They lost 400 plates that slid off the shelves and broke. As a result, they only had enough plates for early dining and had to quickly wash and process plates for the second seating. Our service was slow as a result, but thank goodness no one was hurt. And again, it occurred to us then too how someone could have fallen overboard. The Captain did announce that if anyone lost any items due to breakage, to please report to customer service.