Zoo Joke: Joe's Zoo

So I'm fresh out of zoo jokes - clean ones, anyway - apart from some one-liners.  I found this on YouTube, though, and figured I'd share it (I claim no responsibility for quality of said joke).

I had a substitute teacher in High School who never did much actual "teaching."  Instead, when he would cover our classes, he would spend half the time telling long, elaborate, overly complicated jokes, full of all sorts of details that we would have to remember.  Then, in the last thirty seconds of class, he would suddenly wrap it up and get to the punch-line, which was invariably really corny.  Kind of reminds me of this guy's joke.