They show their existence by harming others. One example, is what happened last year in a house in a near area to my house. The house is on fire more than 28 times for one day. The firemen was astonished because when they put off the fire, it (the fire) starts  again in another place in the house. The strangest thing is that when the fire starts in one thing, it  doesn't start in another thing  very close  to that thing. that family  moved their house contents to the neighbors to protect them but the fire continues in the family properties at neighbors. The fire was not the only thing that harmed that family. These strange things stopped after the interference of a Moslim guy who recited the Quran until they heard a voice who screemed "Stop this recital". That guy responded: "Who are you?" The voice answered: "My name is ..." (I can't remember the name) The guy said: "What are you doing here? Why are you harming this family?" The voice said: "Let this family leave this house or I will kill them all." The guy said: "Whay are you doing this?" The voice said: "They killed one of us." The guy said: "How?" The voice said: "He was in the bathroom when  the woman dropped hot water she used.  This  harmed that Jin very much and he died. I will revenge." The guy said: "She didn't mean to do it. She didn't  know  that you  were in the bathroom where  you like  to stay." The voice said: "It doesn't matter. I will kill them all. This house  now is ours. They must leave." The guy said: "If you  didn't leave the house, I  will kill you." The guy started to recite again and again. The people who gathered  there heard the scream again. It started to fade until it vanished. The guy said: "The house now is secured."