Residents should always use caution when trimming trees near power lines and a Trion man found out just why on Monday afternoon.  According to reports the 41 year old man was trimming a tree near a live power line when he received a jolt of electricity from the line.  Trion Police Chief Chad Spraggins said that the man was alert and responding to first responders, but he was sent to Erlanger Medical Center in Chattanooga.  The electricity arced and struck a metal harness the man was wearing while trimming the tree.