Today I was tapping my heal on a hard floor. My knee was extended halfway between 90 degrees and full extension when I was tapping my heal. I felt a weird sensation, not pain, but just an odd feeling in the base of my knee where the patella tendon ends. I've never injured this knee before and am an active individual playing sports 2x a week and lifting on other days. I haven't had any problems doing those activities such as full ROM squats and other exercises. Following the weird feeling my knee felt stiff and I was reluctant to put weight on it when standing up however I think this may just be a mental thing because of the slight stiffness. I'm currently experiencing tightness in the back of my knee where the hamstring connects and slight tightness around the base of the tendon. Anyone have any ideas on what this could be?

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