i laugh....but now that I think about it, it could probably happen!
I still remember the Newcastle event where there was a car wreck burning during the event, safe to say it wasn't mapped!!
Sweet, my Sheffield days might come in handy this weekend
We'll we organised the Oz MTBO champs 5 or so years ago at Kitchener, a cow's head appeared over night on the course - yet another unmapped feature. Watch out on Sunday as it's the same map.