If a Goliath dropped a grappled creature over head, would it take 1d6 from 10ft. fall, be prone and grappled?

If a Goliath dropped a grappled creature over head, would it take 1d6b from 10ft. fall, be prone, AND grappled? I'd end the grapple

— Mike Mearls (@mikemearls) July 10, 2017