The aircraft's nose was down to a minus-23-degree angle because of which its descent rate increased rapidly and went up to 21,000 feet per minute even as the overspeed warning blared loudly in the cockpit.
& then
"On entering the cockpit, he was shocked when he saw the Primary Flight Display, which displays information on altitude, vertical speed (in this case rate of descent) and the air speed. It showed the aircraft's nose was down by minus 23 degrees
I know these new fangled jets are comfy, but I reckon he may have had a tadge inclination he was "23" degress nose down before he got there!!!
