Im making an NPC spellcaster that will kind of center around Bigby's hand and telekinesis spells, and I was wondering if you could use Bigby's hand to fly. Could you grapple yourself for a quick getaway and just fly? I know this isnt particularly efficient when the fly spell exists but i think its pretty cool. Anything RAW stopping this?
The Grasping Hand section of Bigby's Hand reads. "The hand attempts to grapple a Huge or smaller creature within 5 feet of it." If the caster is a creature within 5 feet of the hand, nothing prevents them from grappling themselves with it. Then, as answered in "Can Bigby's Hand move creatures that are Grappled into the air?", you can fly yourself around. Just don't use the crushing action!
There is one catch, if you are dealing strictly with RAW. As answered in Is it possible to fail an ability check on purpose?, there is no RAW way to simply accept a grapple. This would be an unusually strict reading of the rules, but it's worth keeping in mind.