Several days ago I was skiing, and in a thin-cover area I went across a pothole/small crater. It was too late when I saw it. I managed to get my tips above the pothole, but my left leg pretty much got driven into the front ridge of the pothole. It threw my left knee around.
I didn't feel or hear any "pops" or "slides" or anything, but there was a dull feeling of discomfort; not pain, but discomfort.
Anybody have any ideas? It was akin to sitting down on a hard chair too fast and compressing the spine... this happened in the knee.
I was able to ski full speed without any pain for another 45 minutes, but like I said, it just felt weird.