ON OCCASION THE TRUNK WILL SUDDENLY FALL DOWN WHEN IT SHOULD REMAIN UP. THE TRUNK HAS FALLEN ON MY HEAD AND INJURED ME MORE THAN ONCE. THIS IS A SAFETY HAZARD. THE VEHICLE IS A 2011 DODGE CHALLENGER SRT8 WITH ABOUT 80K MILES. VEHICLE IS PARKED AND TURNED OFF WHEN THE ISSUE OCCURS. THE ISSUE HAS BEEN OCCURRING FOR SEVERAL MONTHS.