Friday night May 19th the Millstone Township Fire Company was dispatched mutual aid into Jackson on Rt. 537 by Great Adventure for a reported multiple vehicle accident with possible entrapment.  Engine 3275 (Bice), Rescue 3285 (Wehmann) and 3266 (Chief Fiore) responded.  While enroute reports confirmed heavy entrapment in multiple vehicles.  Jackson Station 56 and New Egypt 39 were also dispatched.  Upon arrival all hands went to work with extrication tools on each vehicle.  Jackson EMS coordinated multiple BLS/ALS units and also requested medivacs for each patient.  The LZ was set up at Great Adventure.  NJSP closed a portion of 537 for several hours while they completed an investigation.