I suspect that all that has happened is that they have decided to take an earlier high-speed exit than planned and someone's stomped on the brakes a wee bit too hard in their enthusiasm. From what I remember there's almost always a light tail-wind on the ILS approach for RWY 10 and the first high-speed exit for the terminal requires a determined effort to make!
The 'bang' was probably something shifting with the braking, most likely the toilet seat! You'd be surprised the number of times you hear it fall closed from the flight deck when the brakes are applied after landing...
