Knotted Yet said
Carbon fiber. It absorbed the impact by breaking spectacularly. Goooooood bike! Extra love in that bike's direction!

ETA: be sure to replace your helmet, too. Another designed-to-be-disposable item which sacrifices itself on impact.
Then I replied
Are you seriously suggesting that the frame breaking into 4 pieces is a sales point for carbon fiber? And are you suggesting that if it hadn't she would have been hurt?
My dim hump day brain thought you were implying the catastrophic failure as an actual virtue of carbon. A closer read realizes I may have that wrong (plus the wise words of another forum member via pm).

Anyway, apologies for not getting the sarcasm

I do think carbon has its place in the bike world. But it must be taken care of very carefully and specifically (like torquing bolts correctly), and owners or potential buyers should be aware that if they fail, they do fail catastrophically, injury is more likely with catastrophic failures, and no warranty will cover--and very, very few crafts people can repair--carbon once it is damaged.

OK rant over