The three facts I remember about the GMF are 1) it was up to 25 feet deep (!), 2) moved at up at 35 mph (!!), and 3) for many years afterward, people said the whole neighborhood would smell like molasses in the summer (!!!)
omg have you not had the delight of watching Puppet History? This is the episode. The singing horse is at the end, but you should watch the whole thing.