I do PDR, I cant really tell much from that pic. Stand further back, about 3 feet and put a lighted reflection in the back ground. I'm pretty sure there is no tool access up there but it dosent seem to be sharp or creased so glue shouldnt be a problem. DONT ATTEMPT TO FIX IT YOURSELF. I get alot of calls from people saying they tried to push it out and now decide to have a pro fix it. I wont touch these. If you dont knock down crowns and relieve pressure in the correct order you will make PDR impossible. Then your stuck with a expensive and time consuming convential repair.
