Did you see my comment #1? It looks to me as if the fuel is pouring out of where the left refueling pod is normally attached.
Pure speculation: The F-35B somehow collided with the refueling pod, or else somehow the hose and drogue jammed and the F-35B pulled the refueling pod off of the wing.
That is probably what happened.
OR
The F-35 pilot turned away at a sharp angle before disengaging the hose, it jerked the nose from off his aircraft and it crashed, the KC-130 was damaged and had to make a crash landing..................
Which engines are # 3&4? Raider 50 said those were the two out.
Crash picture looks like two on right have some damage from landing or collision.