Sorry about that: I expect you heard it all before. I've a nerve problem and lost use of my left calf muscle, so I fall over a lot when its rough or slippy.
Sorry to hear that. It was quite amusing at the time, but now it seems like I am mocking the afflicted. I'd like to say I hope it gets better soon, but it doesn't sound like the sort of thing that will, so I'll say keep enjoying your orienteering and swear as much as you like.
Thanks. Leg is not going to get better, best I can do is broaden my vocabulary.
Call it "Forest Tourettes" ;-)