Turned a Harley Sportster into a pretzel after hitting a power pole on a blind curve. I did not make out much better, but survived after spending two months on my back in the hospital. Lived on a cattle ranch about 5 miles from Highway 101. The road from the ranch house to the pavement was dirt. Dad (or someone) placed some bed slippers on the back bumper of his Dodge Dakota. Found the slippers on the street at the freeway on ramp after about a 10 minute drive from the ranch to Highway 101. Driving an armored truck, my partner left his sun glasses on the rear bumper of the vehicle. It case you did not know, rear suspension of those trucks is very stiff and bouncy. We drove from this last stop with the sunglasses sitting on the flat of the diamond-plate rear bumper back to our office/garage in downtown San Diego using both freeway and surface streets (probably a ten minute drive). The sunglasses had not moved upon our return.