That's what happened to me in medical terms. It results from badly twisting your foot e.g. during running. Running on the streets is indeed dangerous, with a lot of debris and potholes you need to be careful where you put your feet and the one time you are distracted...bang, you have busted your foot. This accident will change my training habits for sure. It may take 6-8 weeks to recover and I have to wear a removable cast. It's a lot like wearing a ski or snowboard boot most of the time, you just never have the chance to make a downhill run.
These are the most immediate implications of this injury for me:
1) No more 5K run I have been training for in the past months.
2) No more windsurfing for 6-8 weeks which means no racing at the East Coast festival in about a week.
Good news are that I can swim. Anyhow, I'm focusing on recovering and hope to be able to jump on that board before the sea freezes. I don't have a drysuit and sitting on a chair is not the best way to end the season...
(that's what you get when you are not careful)