Yeah, I'm just an SLF, but my intuition agrees with Sabenaboy - landing went ok, plane slowed on plan, pilots retracted buckets and decreased braking because they decided they were at taxi speed, which is where the passengers felt "acceleration", and then some steering malfunction or pilot error happened and then it went so fast and the airframe had so much residual energy that physics took over. I wouldn't blame this on bad landing execution, although it is quite possible some pilot error did occur on the ground.
A lot of people here -pilots- talk about the necessity of ensuring safe landing parameters for a potential go-around in the event of an engine issue, but no one ever speaks about safe taxi parameters to recover from a mechanical issue during taxi.
Obviously this runway is a really bad place for a runway excursion. Luckily Murphy seems to have been on lunch break.
The voice recorder in this one will be really interesting.