Several year ago while riding the Kilaminjaro Safari at Animal Kingdom the driver saw an animal (a bird maybe) go under the truck at a stop but didn't see him come back out. He had to call for another CM in a smaller vehicle to come and look all around the truck. We were stopped for over a half an hour waiting for the person to come out and check. It was a scenario I had not considered before on the safari, but I can see how it could have been traumatizing to run over an animal, or worse, for the next truck to find it's carcass.