@MCMurtaghlots of chat with flying has been grappling someone and dropping them from heights. How would you rule accomplishing this? I'd make it fairly hard – creature would have to be smaller than flier, strength contest with target at advantage
— Mike Mearls (@mikemearls) March 11, 2015
@jtburling stunned creature auto fails dex and str saves – but any effect on ability checks, like resisting a grapple attempt? Thx! The rules leave the answer to this question up to the DM. In most cases, I'd have a stunned creature fail to resist a grapple.
— Jeremy Crawford (@JeremyECrawford) November 5, 2014