If you're not a person who's spent much time with legos, it might be hard to grasp why this is considered an "engineering feat". LEGO is a system of modular building after all, right?

However, the kind of weight that 1,000,000 Legos is (in this case, north of 3,300 pounds) means that they had to use pieces, none of which (I believe) exceed 8" in length, to form the support structure of this vehicle. I would _love_ to see the "chassis" of this thing. Probably some gigantic rail structures holding it all together.