Saints Row 2. In the underground mall in a Superiore (Lamborghini basically). Going full-speed down an isle, mowing down citizens. Suddenly hit a ramp. I instinctively bailed out, leaping to safety. Hitting the ground took about half my health, then the car hit the ceiling and fell onto me.
Also, using zero-gravity + evil cars cheats. Stood on the support column of a freeway overpass watching cars smash to death in front of me. Suddenly, a truck came speeding in, smashed against some small car and barrel-roled into me. I got knocked backwards miles (thanks to Zero gravity) and landed on the roof of a multi-story car park. There, lying in wait was a car. PLUS the truck that hit me had landed upright. I got hit in the crossfire of the two and sent flying back onto the freeway. Now, when there's about 10 cars all trying to kill you, you do NOT want to land right near all of them. I ran but...yeah...