Really Blown Motor

[Lurch]

What really happened to this engine? I sent pictures to Ford Motor Company, JDM and other places,To see what they though of my thought of what happened. I think the Freeze plug that was found missing in the front of the block filled the engine up with water and Hydrostatic locked the engine from the bottom side and snapped everything almost at the same time They all agree. The problem is What made the freeze plug come out? Thanks Mitch P.S. The picture where the freeze plug is laying in the slot where the hole is that is the way it was when I removed the timing chain