Hinduism is very rich in its culture, mythological stories, and in its belief. We believe in every aspect of a story whether it is about God or Demons, or the struggle between them, and the triumph of God over Demons. All the mythological tales have been mentioned in Purans. And another interesting story is of Demon Bhasmasura and Apsara Mohini.
And Lord Shiva granted him a boon, but Bhasmasura wanted to test the powers on lord itself and said, “I should check whether the boon is true or not on you.” And he went near him to place his hands on Shivas head but lord was alert and he ran off. But Bhasmasura followed him, meanwhile Shiva wandered in search of Lord Vishnu.
Eventually, lord Shiva requested for a help from Lord Vishnu. And Vishnu appeared before Bhasmasura in the form of Apsara Mohini, the only female embodiment of Lord Vishnu. Mohini was extremely beautiful Apsara that Bhasmasura fell in love immediately. He could not stop himself and proposed Mohini for a marriage. She agreed in one condition that Bhasmasura would have to dance identically as hers. And while dancing Bhasmasura tried matching Mohinis dance moves.
And in a step, she suddenly placed her hand on her own head. As Bhasmasura was copying her, then he put his hand on his head. Because of the boon, Bhasmasura burnt into ashes. That is how a fool Demon became a reason for his own death. And Lord Vishnu as in Mohini trapped him to use his own power into curse.