Every year, a day after Diwali, villagers gather in Dhami near Shimla, Himachal Pradesh, for a ritual that involves throwing stones at each other. Known as Patthar Ka Khel, or the Stone Fair, the tradition is believed to be around 400 years old. During the ritual, two groups pelt stones at each other until someone sustains a minor injury and begins to bleed. A few drops of the person's blood are then offered to the local deity, Goddess Bhadrakali. According to local belief, the practice began as an alternative to human sacrifice, which was performed to protect the village from diseases and natural calamities. Another local belief links the tradition to the erstwhile queen of Dhami, who is said to have burnt herself alive to end the practice of human sacrifice. The fair is now held at the spot where she is believed to have made the sacrifice. Before the ritual begins, a prayer procession takes place from the ancient temple of Lord Narasimha, built by a former king. After the prayers, a member of the royal family traditionally throws the first stone. The local administration and organising committee monitor the event to prevent serious injuries. Safety nets, barricades and medical teams are deployed around the grounds during the ritual.