"But here's the thing: Jason makes no sense. There's no proper explanation for him. He was a deformed and possibly developmentally disabled child who apparently drowned in Crystal Lake, but it turns out he didn't, or maybe he did and came back from the dead somehow. He's not really a zombie, but he is undead; but even before he became truly supernatural when he was killed in Part IV and rose from the grave in Part VI, he was able to take crazy amounts of punishment. In Part VIII he gets hit with toxic waste and somehow reverts back to a little boy, which is ignored in Jason Goes To Hell, in which he's a magical, body-hopping creature. Which, in turn, is ignored in Jason X where they talk about him having regenerative properties like Wolverine."