Seriously, the original Magic Engine Twilight helped me build was strong enough to upgrade the train that ran through Canterlot. The first time I ran it through my motorcycle I nearly pissed my pants when I went zero to one-sixty kilometers per hour (100 in freedom units) in the span of a second. The G-forces acting on my body were one thing, the fact that I was doing the test run on a cobblestone road meant the potential for death had I hit a disagreeable bump.