Zeus then ordered Thanatos to chain Sisyphus in Tartarus. Sisyphus was curious as to why Charon, whose job it was to guide souls to the underworld, had not appeared on this occasion. Sisyphus slyly asked Thanatos to demonstrate how the chains worked. As Thanatos was granting him his wish, Sisyphus seized the opportunity and trapped Thanatos in the chains instead. Once Thanatos was bound by the strong chains, no one died on Earth. This caused an uproar and Ares, annoyed that his battles had lost their fun because his opponents would not die, intervened. The exasperated Ares freed Thanatos and turned Sisyphus over to him.