I did this on when I slipped out on a box snowboarding. My shin straight up has little peaks and valleys from bone chips that presumably came lose that day and relocated and I’m guessing eventually healed / just fused into their new spot? It hurt like a bitch at the time, but I knew I didn’t break it and never went to the DR about it. It must look real interesting on an X ray. Now if I slide the skin up and down on my shin you can see all the chips. I don’t have any pain from it, just a weird injury with a bit of a story to tell.