There's a lot of abilities that Peter could've picked up from Sylar that he doesn't know about besides the super hearing, like the photographic memory, and the ability to liquefy solid objects.
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Cameron originally envisioned the Terminator as a small, unremarkable man, giving it the ability to blend in more easily. As a result, his first choice for the part was Lance Henriksen. O. J. Simpson was on the shortlist but Cameron did not think that such a nice guy could be a ruthless killer.
-From the Collector's Edition DVD of The Terminator
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