The piece you're looking for is here -- or just scroll down. It just hasn't been linked to using the standard Lab permalink format.
Of course, this is entirely my fault, since I never advertised that the Lab has permalinks. I'm still trying to figure out why you don't see a hand cursor when you mouse over the green boxes, but they do have the right URLs to link specific pieces.
Anyway, enjoy your visit, and please don't feed the animals.