Job often demands some action shots from the children. The funny thing is, they're active all the time. The posing just gets them together. Obie wouldn't run, but the other six that could did.
Jack is, how-you-say, not so fast.
Jack was still building up to it...although I don't think that he can get his feet off the ground by jumping. By falling, tripping, or just walking, yes, but not jumping. It doesn't do a thing for him. (And lest you forget, us Paulson girls tend to be earthbound.)