What happens to an airborne Resilient sphere?

[Elvinis75]

Does it freeze in the air or does it fall to the ground??

If it is in the air how much damage does it do it a flying creature runs into it?

 

[Artoomis]

Does it freeze in the air or does it fall to the ground??

If it is in the air how much damage does it do it a flying creature runs into it?

It appears that it simply surrounds a creature (if it can) and stays in place for the duration of the spell.

It seems to me there are rules for the sort of damage you are thinking of somewhere, but in lieu of those how about 1d6 per 10' of movement, providing the creature cannot hover (not "good" or "perfect" maneuverability).