ok, this is a tough one, i severed my quad tendon racing a couple of years ago, yes the snapping sounded like a rock hitting my knee guard. just as stated above, you will have to be in a brace for a while after surgery, and will have to deal with gaining your range of motion back as well as the atrophy in your leg muscles. you will be able to get around, it was my left leg and i drove my moto van because your leg will be relatively straight in the brace and the leg room in the van worked well. stick with the therapy and dont get discouraged. i think the patellar is less serious. good luck. it ended my middle aged man running sports that required changes of direction, but my golf game has never been better and i do still moto.