We stopped about 100' behind this truck. The driver threw it into reverse and gunned it. My guess when he was looking in the mirrors, he was looking at the rear tires and position in the road and not what was actually behind him. He had a "helper" in the truck who should have been acting as a spotter but wasn't. There was no place for dad to go as there was a pickup truck and trailer parked on the right shoulder of the road. I've gone over this in my head hundreds of times since last Wednesday and the only thing we could have done differently is stay home.
Don't beat yourself up like that. It sounds like you did the right thing, because even though the bike is toast, your dad is still here to get it fixed. I've thought about that scenario before, that there might come a
time when I just have to launch myself from the bike in order to save myself. I love my bike, but if I have to let it go in order to save myself that's what will happen.
It's a sucky situation for sure, to have a broken bike and not enough insurance money, but I commend your dad for knowing when to bail and being able to do it.