A whopping 4.9 degrees nose down input after the last bounce must have been a case of momentary insanity, especially in a transport category airplane.
Elementary flying skills learned from day one in flight school had taught most of us that after a bounced touchdown, if not initiating a go-around, then we would add a touch of power, level the pitch for a second flare and touchdown.
Never ever to dive the nose into the ground as these FedUp guys had done.