Whether or not "Some" of the bikes had not yet left the lot is irreleventSome of the bikes had not yet even left the parking lot. Nobody was doing any 80mph. You're just making s**t up.
I'm liking the theory (deerdad's?) that someone in uniform picked on you as a kid. It would actually explain a LOT.
At least 5 of them had and were close enough together to be involved.
I've lost two friends to bike accidents over the years and their choices were their choices wrt riding habits and helmets.......and not once have I criticized them even though it contributed to their deaths