I saw a theory for that plot twist back at the episode 3 or 5 discussion on reddit. So I kind of was less 'holy shit whaaaaat' and more 'ah, I knew that was going to happen'.
Also, watch Steins;Gate. There's a reason why it has such a good rating on MAL.
Also, watch Steins;Gate. There's a reason why it has such a good rating on MAL.