The "game" is really a seance. The seance is performed by first lighting a candle to "open the door" to the spirit world. The person chosen to play then holds the embalmed severed hand in a position like they're shaking hands. They say "talk to me," and a spirit will appear in front of them, though the spirit is invisible to everyone else. When the person says "I let you in," that gives the spirit permission to possess their body. Once possession begins, a timer is started for 90 seconds. Before the 90 seconds are up, the candle is blown out which closes the door to the other world and ends the possession.