SS - it is a wholesale/firesale exit by someone - they have...

SS - it is a wholesale/firesale exit by someone - they have decided they want out for whatever reason - large gain from buying on lows so now take profit or sick of the endless yoyo share price and never seemingly finding breakout and or deciding their money will make more certain returns on some other high volume high growth stock

whatever other reason they are dumping and dumping hard and seemingly will do so until they are fully sold