but they stretched a bit to make it happen- since when could werewolves make theselves change?

I think that was the point--nobody's tried it before because it would be stupid to subject yourself to that sort of pain, and who else would have a reason? I thought it made sense that it kills you. That didn't bother me.

I still think that the reason Nina's death was offscreen was that Sinead wasn't coming back for the season at all. But yeah, it could have been handled differently.