Biggest natural surprise: Plethora of birds at Joburg airport hotel.
Biggest man made surprise: Discovering someone using an acetylene torch to cut a hole in the side of the ship next to our cabin - while we were at sea. (The ship has some ventilation issues.)
Least pleasant experience (Donald). Trying to put on a 7mm wet suit that was too small.
Least pleasant experience (Esther). Exercising on the ellipse machine while cruising in heavy seas (resulting in uniquely unpleasant motion sickness).
Best bird: Saddle-billed Stork. (Runner-up: African Penguins.)
Best mammals: Baby Hippos. (Runner-up: More Baby Hippos.)
Best reptiles: Nile Crocodiles.
Best site: Kirstenbosch Botanical Garden. It's stunning (and a great birding spot to boot).
Important warning: "Baboons are dangerous and attracted by food."
Most intuitive warning: "Keep your hands and feet inside the shark cage."
Least intuitive warning: "Don't hold the handrail." (The gondola to the top of Table Mountain in Cape Town rotates during the ascent and decline, so you can't hold the handrail; one wonders what it's for.)