So I was getting into my car this afternoon according to my usual method, which is to put my right foot into the floor well, keeping my left foot on the ground next to the car, sit down in the driver's seat, then pull my left leg into the car. Well, as I sat down, angling my left leg as necessary, I suffered an agonizing twinge in my knee.
As I sat recovering from the pain, a light bulb turned on over my head. Actually, it was already on—it was just the dome light in my car. But, in a completely unrelated event, I had an idea. Maybe the way I've been getting into my car is the root cause of my knee pain. Before the popping event on Friday afternoon, I had wondered what was causing my knee pain as I so seldom exert myself. It's not like I play contact sports. But I do bend my leg awkwardly getting into the car.
So now I'm going to see if a new method makes the pain go away. I shall sit down on the driver's seat with both feet outside the car, then swing both legs in.
A few years ago, I had a similar aha! moment with the plantar fasciitis I had been suffering. Plantar fasciitis is an excruciating pain in your heel. It bothered me most when I first got up in the morning, but I felt it at various times. Then one day I parked in a strip mall parking lot and, as I walked to the place of business I had come to visit, I walked across a grass median. I noticed that walking on the pavement hurt, but walking on the grass did not. If I had been in my car, the dome light would have turned on. I realized that, living in a basement apartment, my floors were basically cement, I walked my dog on the sidewalk, and just in general trod hard surfaces either in bare feet or thin-soled shoes. I bought thicker-soled, more cushioned shoes, including Birkenstocks to schlep around in in the house, and voila! my plantar fasciitis disappeared and never came back.
I confidently expect the same for my knee pain.