I witnessed the power of a Honda Accord's crumple zone as it plowed into the rear of a Jeep Cherokee at about 35mph on my way home from camping this weekend. I had pulled off the highway to pick up some farm-fresh produce and saw it from the side of the road. The car was not a pretty sight, but its occupants were all ok, at least according to their own assessments. The Jeep was amazingly unscathed...