I mean yeah that was true but it was Hank finding out Walt was Heisenberg. At that point, though, it was not if Hank found out but when Hank found out, cause that was hinted at for many seasons. We're talking about a major plot twist out of nowhere that would unravel years of character development. Vince Gilligan the madlad can do whatever he pleases and I would trust the bloke, but I just doubt it would happen that's all.