Imagine your favourite character filled to the brim. No place anymore, totally full. Still there's something this character can do! What could it be?
* b-word. Teetering on the brink and then having atoms rearranged: becoming rubbery pieces, or making a gory mess, or detonating into heating and lighting, or flooding the place, whatever, etc. etc. etc.
* flying. Very popular
* um... just having fun of being there? Staying inflated and doing nothing for all eternity - quite frequent