Yeah, right
It could have been a case of some sort of automation problem or fackup, followed by the real fackup, the two guys heads down trying to sort it out with the airplane sinking at over 2,500 fpm.
that could explain the very low height at that distance from the runway and the high sink rates. I don't understand how a crew seeing what is going on keeps it going until they manage to stop the sink with a buffer of less than 500 ft to terrain.
The GPWS warning, was it conventional or EGPWS?