I was sawing today with my Jonsered 535 and he saw got pinched in the limb I was trying to cut. After a while I got it free. But now the chain won't move at all. It feels like the chain brake is on and the plastic piece in front that activates the brake goes back a lot further than it normally does. I haven't yet taken things apart to see what I can do. Any ideas? Did the bar get bent? I'd be very grateful for your help and suggestions.