How would a seat malfunction in a way that someone could get hurt like that
Best guess is it may have been a combo of a harness unexpectedly releasing and/or the guest not paying attention with their arm in the wrong place?
Rode this yesterday and was impressed by both the theming and the ride. It was the only coaster that wasn't walk-on, but it was worth the 45 minute wait. (And that's saying something, because I love my quick-queues...)