The Departed is undone by a silly strain of events following one of the main character's demise. If the entire elevator sequence was shot using South Park characters and animation, verbatim, it'd be hysterical. As is, it just seems awkward and slightly humorous, but mostly surreal. And not in a good way. In the kind of way like, "What the fuck, why did they just ruin a perfectly good movie?"
Yeah that pissed me and my wife the fuck off.
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WHAT THE FUCK THEY JUST FUCKING KILLED THE GOOD GUY!!
I also just saw the prestige 2 days ago and thought it was awesome.
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We kept talking about "hey now wait, if he was the guy that stayed there, then he always died going in, but if he said "you dont know what it's like, thinking about if you'll be the one in the tank or the one up there"...then you think well, either the split is random, or the original guy stays there on the platform, so either way the original guy is dead.
but if the guy teleports then the original is also dead because he shot him...
my personally opinion on the matter though is that there is no original. once they are copied, the copies are SO exact that there technically is no original. so the original was completely destroyed once he did the first copy, which was before he shot the other one. that's also why he never knew if he went in the tank or not, because if it's the same conscious person, he wouldn't know which mind goes where.... since he's exactly the same.