When I heard that it was blunt force trauma, the first thing I thought of was someone's shoe or phone flying off and hitting the person. The article I read did say that Universal has metal detectors to ensure that people really do empty their pockets, so I guess this is less likely. But is it possible that something broke off the track or the ride vehicle that could have hit him? I haven't read a bunch of articles to see if anyone on the ground saw something while waiting in line. My friend lost the external piece of her cochlear implant on the launch sequence of the Hulk coaster. I don't think something like that would be enough to hurt someone, but I think a falling object could be a possible cause.