So the other day I was watching ROTF again, and one thought led to another, until I concluded that Prime didn't rip of the Fallen's face. First, I was thinking that Optimus must be the runt of the litter of Primes. Compared to the Fallen and the other Primes, he's kinda short. Optimus doesn't look like any of the other Primes, either. Granted, we've only seen a couple glimpses of his Cybertronian form, but he didn't have all those things hanging all over him. So then I thought that maybe what we are actually seeing are a head dress of sorts... some type of Prime decoration or something. So FF to the end of ROTF when Optimus utters his dreadful line of face removal, he didn't actually remove the Fallen's face, because we saw his face after Optimus pryied off his head dress. So there you have it. Optimus didn't remove the Fallen's face; it was just a figure of speach.