[null and void]

It looks to me like he starts to crumple before the white dot appears.

Hard to say. But you do see the white dot? It's not just me?

[Drawsing]

Yeah, I see it, but whatever hit him would probably be moving too fast to see. On the other hand, he could have just got the wind sucked out of him from the blast. He could have been close to collapsing without the explosion.