In Pathfinder, flight maneuverability levels imply a bonus or penalty to their Fly skill when using their fly ability, according to this table
The spell Touch of Gracelessness, and I'm sure other effects, can reduce this rating by one step. So, let's say that a creature with a current rating of Clumsy (-8) is hit with this spell and fails her fort save; what happens to it?
The question, then, would be: What happens to a creature with Clumsy maneuverability when some effect tries to reduce that maneuverability further? Another -4 penalty? Nothing? Can't fly anymore?