Who knows what the Skyraider pilot was thinking? He had just been involved in a collision which he probably thought he had caused, having very nearly crashed himself. Under the circumstances, I reckon my judgement would have been slightly affected. I personally would have done a slow speed handling check at altitude and then not changed configuration, but I wasn't there and didn't see what happened after the collision. And if he didn't, I wouldn't have blamed him.
What we should be asking is what went wrong and who the hell briefed a break from vic with the leader breaking first? Anyone experienced in formation should be cringing watching that video. And before anyone flames me for this opinion, I have a lot of experience in flying formation and wouldn't have contemplated such a manouevre. It was risky - as the outcome proved.