TL;DR from the article is a newbie pushed the column forward by accident and corrected very quickly. Dropped from 600 feet to 400 feet at a rate of 4,000 feet per minute. That’s about three seconds of too-fast descent at a constant 4,000ft/minute, though it wouldn’t have been constant so it may have been a bit longer that that, mostly at lower rates of descent.

Not some huge plunge. Worth an investigation but the headline’s clickbaity.