More on the main topic, I had a huge bat drop a huge rock, those bat aren't kidding.
I've read that an average human would need a wingspan of atleast 7M to fly ...

To carry that huge rock weighing 1000 stone in the air including weight of the bat itself .... anyone good at aviation calc?
(No we don't say it's just magic)
How much is weight is a stone btw is that huge rock enourmous or is 1 stone not that much weigh?