Waldo was secured as usual. A steep knockdown, or 2 or 3, while we still had the main up caused him to go flying. We didn't realize until probably an hour later when Kati went below and saw the mayhem. Harry found him in the bottom of the box under the nav station, picked him up, and dropped him in Bruce's water bowl. He started swimming! Miracle fish! Kati quickly restored his aquarium (pretzel jar) and put him back in. He seems fine!

See before and after photos in the main post (we had the "before" pic from a little while ago).