We made the mistake of buying a minivan once. Was rear ended on a 35mph street so the person who hit us was only going about 40-45 when she hit the car behind us pushing it into us. I had stuff stashed behind the rear seat and found things under the front seats from just a minor impact. One of the rear seat latches even came a little loose. It didn't even damage our vehicle, my reflexes were fast enough that when I heard the screech and crash I took my foot of the brake so it let the force just roll us forward some.
Minivans are just a poor design all around, I'm gald we got rid of ours.