Parker mechanics--what broke??

[Craig Larter]

I was admiring one of my Parkers last evening and was swinging on an imaginary greenhead. When I pulled the trigger something internal broke. The safety will not operate ----- the top lever moves to the right but the gun will not open---actually it just very slightly opens. If I remove the forend the gun still won't open. I took it out to Turnbull's today for repair but I was curious what part broke----any ideas from the mechanical experts?? Thanks Craig