I saw some people on this tour the other day, while I was on the normal Safari ride. They were at the hippo pool --- and let me tell you, the hippos were plenty riled up about it.

Normally when you pass this part, the hippos are pretty listless. But the sight of the tour group hanging above their area (more on that in a moment) had them all in "threaten" mode with the jaws thrown wide open, Jungle Cruise style.
And about that -- that hang above the hippos looks absolutely sick. They were harnessed to a cable, inverted over the cliff at a 45 degree angle with the hippos below. And the rope bridge above the crocs.... Yeah, I know it's all perfectly safe -- but the tour looks like it would be a lot more intense than I expected. After seeing the group on the tour, it's definitely on my list.