That last one's perfectly OK and is going to touch down safely beyond the threshold.
On simulator training for the widebody that I flew - the DC-10 - they stopped it at the 'One Hundred' radio altimeter call and pointed out that the threshold was just vanishing from view i.e. correct. If the threshold was still in sight, you were too low, and should immediately go-around. If it had already disappeared, you were too high, and should again go-around - and you certainly would at this place! It wouldn't surprise me if the 747 has some similar sort of 'radalt check-height' to judge by.
I wonder if the first thing that the KLM captain did on shut-down was to go and make sure that there were no extraneous bits of wire in amongst the wheels?
Ah the lovely Caribbean ... give me gentle old Barbados Grantley Adams any time!
