Here is the deal. I will start my leg workout with squats and do all the warmup sets and use good form on all reps. Then after I finish my sets I move over to stiff leg deadlifts and I have a light weight to warm up with. Well today as I was warming up and right at the bottom of the movement I feel this snap in the area right were your patellar tendon attaches to the tibia. It isn't really painful but it is kind of a shock. It happens really quickly and after that I don't really feel anything. This has happened to me before when I was just leaning over to pick something up after I did squats. Does anyone have any idea as to what I am talking about? I am clueless and would like to figure out a way to fix this. I'm not sure if this matters but I had patellar tendinitis in that knee and not my other one. The knee that I had tendinitis in is the only knee that does this.