Don't know - I'm trying to envision how the blade tip would be under downward and rearward force when the tip struck the runway, perhaps if it was the second tip to hit?
I haven't heard the story yet, but the trinnie gear is free-falling, so in the event of a hydraulic failure it falls down. Unless you damage or restrict the uplock mechanism somehow (ice or oversize tires getting stuck) there's really no way to have a failure failure to extend. I'd bet on distraction, perhaps after going around. I wonder if there was an instructor on board. Next time I'm up there I'll ask and get the story.
Sigh