sometimes they do move too rapidly. I got 4 or five panos that night - a record- but often get none and missed at least one that night. Sometimes they move to rapidly to get any pano, other times they move slowly enough to get several shots and still make it work. It's why a reasonably fast lens and a reasonably high ISO are needed to keep the shutter speed to a minimum, in this case, 15 sec I think.
