Was It Kepler or Newton Who Shouted 'Shotgun'?

I discovered a fun little game Sunday evening called Cosmic Crush, where you steer your little planetoid across the heavens, eating up planets. Whatever you do, don’t play it before heading off for work on Monday morning or you will view every car, truck, and bus as a tasty celestial morsel. Lumbering down the Interstate this morning, most of my ride consisted of these observations:

1. Don’t get too close to the yellow school bus. Ah! Yellow school bus!
2. I can totally take that little SUV. I'm sure it has less mass than my car.
3. Where’s a motorcyclist I can crunch?
4. Two Semis? Pull away! Pull away!
5. That VW Bug is all mine…
6. Watch the oncoming headlights. Watch... Are they pulling me to one side of the freeway?
7. Pull away from the Semi!
8. (Sigh) I'm never going to get to Level Three...