Yes, it will be interesting to see what they decide about the crash. I can see this happening if the seat broke loose from its mounts and suddenly went backwards in the fuselage. But I wonder if the rules for this event don't stipulate that the seat has a support bar of some sort to prevent this from happening? The same thing can happen in a drag car, of course, probably with less dire consequences but dangerous nonetheless. That is why the roll bar and roll cage regulations in the NHRA rules specify that the roll bar has a crossbar that supports the seat. If the safety rules for the Reno air races don't have this kind of a requirement, they certainly should...