I must say, I took a cruise in 1992 to Bahamas. Our ship was bouncing around the waters just like this. We all had our life jackets on and people were puking all over the place. When we got to port, the larger ships had experienced a similar ride (according to their passengers) but our Captain said they have stabilizers and wouldn't have felt the same thing we did. We actually had a passenger sitting on the deck with his feet up - we listed to the starboard side and he went flying across the deck while we all tried to grab him to keep him from slamming into the other side. I know, this sound preposterous...I have it on video! Wild rides do happen!