Coming over the threshold with PAPI indicating four reds, who knows, they might have been in a windshear situation. Wouldn't be a big surprise, trying to land in this weather.
Seat 0A,
That was a very flat approach all the way, way below 3 degrees. Assuming real time (as well as Mk1 eyeballs) time the interval between the auto 500' call and touchdown.
Tootle pip!!