Up and down and all around is a good way to describe "movement".
I could not find an official definition for "movement" even after reading through several highly possible sources so will give you my best understanding of the term.
Movement is the appearance that the bloom is in motion even when it is not being moved by a separate force. Twisting, curling, pinching and irregularly placed segments of the Unusual and Spider forms give the illusion the blooms are moving even if there is no breeze. Along with following the definitions and requirements for registration of Unusual and Spider forms, a sense of movement can be a desired characteristic that separates these two forms from the round (bagel) subform.
Your image above and these from the database all show a sense of motion in the blooms...
If anyone would care to correct or add to what I wrote it might help all of us to understand movement better
