A crazy physics one I found all by myself. :D Given the Keys to the City in Crackdown, I was doing all sorts of crazy shit. Then getting the supercar up to full speed and spawning a ramp truck in front of me sent me soaring skyward for miles, perhaps. In the wrong direction. Turned out, sometimes just spawning one with the bottom of the ramp slightly under your car - whether mobile or not - sent it -blam!-ing flying. It was beautiful.