SitWoo
I don't know. Agent Rambeau was trapped in the hex for a short time. Sounds like what she was experiencing was pretty much the Sunken Place from Get Out. (Google now, watch later.) But I think we would know if we were experiencing that.
I mean, I guess it would be like that. Wanda got her powers from the infinity stones, so that does seem like an example of things it would be like.