My heli just spent a week in a tree, thanks to this little mishap. As you can see I don't look at all happy on take-off... it was darting around in an annoying unsettled way... add to that a little gust of wind and some bad luck and you end up with a helicopter stuck 10m up in a tree.
We got it down eventually of course, or you wouldn't be watching this... My mate Ben used his mad fishing skillz to cast a line over the branch, then we pulled some rope over and shook the crap out of it until the bird fell out. Amazingly, after a week up there, including some storms, it seems fine... time will tell!