Girl almost dies in Cornish mine shaft exploring

Near death experience in a 1700's mine in Cornwall England. During a tour of Luna mine. A rock slid causes The Shafts Presenter Kelly Thorne to slid down a bank in the mine towards to mine shaft drop. A large rock rolls onto her back and pins her to the edge of the drop. Should she have gone over with the rock on to this could have been fatal. Be careful in mines folks they are far from safe!