This is very hard to believe, Airbubba. Not taking you to task, but very skeptical of Andy the twitter entity.
49 degrees nose down is a non trivial departure from anything remotely resembling normal corrective action in a transport aircraft. It's the kind of pitch angle down that you'd see in an aerobatic display.
While I will await further amplifying information, massive nose down pitch of that magnitude is an over-control that is way out of limits for the flight regime the crew were in: getting themselves set up for a standard approach into an airport.
If my hand bumps the control, engine or otherwise, it takes a certain amount of time of "nobody is near the yoke" for that to go from normal flying to 49 degrees nose down and for that to not be immediately corrected.
We'll see what further NTSB releases reveal.