So normally a deer test for cars is a 300-400 pound sandbag hitting the hood or grill, typically can cause some serious damage.  A Moose-test is a 1000 pound sandbag hitting the windshield, frequently this tears of the roof of a car that isn't prepared for it. I have a feeling a scootypuff test might be a water bag around a sandbag on top of a scootypuff.  My theory would be a deathfat is more water/fat and less lean muscle and skeleton, so the water reflects the weight and dynamics of the butter ball outside with the sandbag representing the human trapped in a personal disgusting hell.  Maybe it would have gelatin filling to give it more structure.  So based on that I could see a scootypuff collision test doing a few things.  It would likely dent front worse than a deer.  It would also be prone to lifting most cars on top of the scootypuff, so more likely wheel or axle damage.  But worse of all it would be very messy and likely all over the underside of the car.  I'm not sure if you can total a car from a smell alone, but I would bet this would be how you do it.