I remember looking at my instructor in a Tomahawk immediately after a stall and saying 'are we in a spiral dive or a spin?'. When I looked back at the ASI we were just a whisker off VNE.
There was an interesting article in Flying magazine (I think) a while back stating that in a spiral dive even the trim forces for Va could potentially cause a structural failure - you don't necessarily need to pull back on the stick at all.
Revisiting the PC-12 Crash | Flying Magazine