Obviously this is quite old but I just wanted to verify that MPond is in fact absolutely correct and wilson is wrong. Anything behind the vertical plane off of the pivot point, i.e. front axle, will be lower than that point until both tires are within the trailer. The rear will never be higher than the intersection of the horizontal plane of the roof line and the vertical plane of the front axle. However, had he been loading a perfect rectangle with axles, anything in front of the front axle likely would hit, which is why you don't back in.
The Yellowtail Build
Originally Posted by Jeremy Clarkson - Top Gear Botswana Special
Why don't all cars have no doors? When I come to power I'm going to make it a rule because this is just better.