Spoke to a friend who witnessed the incident and he said it (from a plank drivers point of view) was hovering and then started to spin and landed hard, he also said that there was no noticeable damage. We were both drinking at the time he told me this story so sorry if it is a little wrong, but he seems to be the only reliable source or witness to this event I know.
But there is a new 412 there vh-bzh (I think thats what it said)
