So this morning I noticed that the medial aspect of my right ankle was slightly painful. Upon further inspection, I saw:

[1]

Now I haven't had any alcohol, or any other mind-altering substances (unless you count nitrogen narcosis), so you would think I would remember doing that. But nope, no recollection. Maybe I did do it on the reef, since I am now using closed heel fins, so no exposure protection from booties.

So anyone in Grenada remember me doing this? Any clues would be appreciated.