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I went to a Comic Fest in San Diego, CA that was featuring Jeremy Shada (voice actor for Finn). His father was letting out a secret that something will happen to Finn's arm. And I thought about the "Puhoy" episode when, in Finn's dream world, he, as an old man, had a pillow for an arm! And the episode, "The Vault", where his past self even had a robotic arm! Both were right arms. And now, the penultimate episode from "Rattleballs" was "Blade of Grass" right? A cursed grass sword STUCK to his right arm! Finn finally accepts it, but I think he'll, someday, cut off his arm and get another arm--a robotic arm maybe? Like in "Who Would Win", Finn mentions he wants a bionic legs, or whatever. And Jake says it's not natural. Coincidence? I think not!