I keep 'popping' my ankle when walking. I feel intense pain for about 10 seconds and start to limp but after a little while the pain subsides and there's not much evidence of anything having happened.
It originally happened on a rugby pitch over 20 years ago (jeez...) when I was 15 and jogging backwards, both ankles gave way. Everybody on the sidelines heard them both pop and made an audible "oooohhhhhh". Within 5 minutes I was back and playing again.
It usually happens around once a year but it's happened a couple of times in quick succession so a bit annoyed about it.