 They cursed him to push a boulder up the hill all day long, every day for eternity. And his job was to push it over the hill, but he could never get over the top. When he got to the top of the hill, just before he pushed it over, it would roll back on him and mangle him. And then roll down the hill, and he'd spend all night long walking back down the hill to the boulder, and then he'd push it up again. And in the view of many people, Sisyphus would have been a miserable person.