I'm curious if anyone has seen this before and if so, what would be causing it? With 4 decades under my belt, I've never seen this before. This is a Green Crack growing in an open ended green house. The plant seems healthy, yet it's kinda falling down with twisting leaves. The lower limbs don't seem to be affected. This started at one end of the grow and is working it's way to the other end. Any help would be appreciated.