Combination of the two, China parts receive activation signal and malfunction?

Satellite laser? "We can hit your planes on the runway."

Here's an outside chance that raises the conspiracy level: last time we lost one of these birds it caught fire whilst at... Nellis. A message?

It could also just be as reports have said, problems with the engines. Although, I've since heard 'auto-ejection-system' was triggered, and, the video I first saw on Sky News Australia shows burn/scorch marks on the fuselage where the cockpit is.
Normal for ejection?

Or the black goo is sentient and angry.