prefer not to be talking balls..cotton or otherwise .. aware. bumble bees do not seem to obey our calculations for flight/weight /wing span etc . however we don not know everything and nature often surprises us. wasn’t that long ago we found boson particle and an energy wave that can change state without reason! being either one thing or another at random. only thing I think that bothers many of us is work phobia.. hence many avoid it at all costs!