I'd bet the was a half a second or so of new noises that didn't sound right. Before they could process that they were about to die, they were dead.
There's one piece that I want to see that wasn't in the pictures or the video. It's the thimble that they laid the CF over. Would have probably been made from the same material as the collars and domes, titanium.
When the CF failed, it would have taken all the pressure for a millisecond and collapsed around the everything inside it to the point there would be no air space inside it.
That piece would show the power of what happened and should have been on bottom.