根据维基百科:
Zeus accordingly displayed his own cleverness by enchanting the boulder into rolling away from King Sisyphus before he reached the top which ended up consigning Sisyphus to an eternity of useless efforts and unending frustration. Thus it came to pass that pointless or interminable activities are sometimes described as Sisyphean. He was punished for chronic deceitfulness by being compelled to roll an immense boulder up a hill, only to watch it roll back down, repeating this action forever.
Sisyphus 被要求将一块巨石推到山顶,每当快到山顶的时候,Zeus 便会使用神力将石头滚下山。这样 Sisyphus 背叛死神的代价,就是永生永世地陷入这个死循环(forever)。
这也就解释了为什么杰西会陷入到这个(永生永世无可解的)杀戮死循环里。