A big part of it was also 100,000 or so people on the streets watching the game. The transit system was packed and not everyone could make it out of downtown easily
I was going to mention the Generator system. I hope that pans out, but I have heard a while back that it was poorly documented and not all that developed.
I'm no carriage expert, but don't they usually have bigger wheels in the rear? think that would look cool with some drive system with belts and whatnot.