TWIITER:http://www.twitter.com/top5unknowns<br />GPLUS: https://google.com/+Top5Unknowns/<br />SUBSCRIBE HERE:https://www.youtube.com/user/Top5Unknowns?sub_confirmation=1<br /><br />From a mysterious hum to a haunted playground here are 5 Unexplained Supernatural Phenomena, Which do you think is the strangest?<br /><br />Music: Kevin MacLeod - Darkest Child
