In our area there's a well-known racing monohull named "DonneyBrooke", which I believe is a custom/modified Santa Cruz 52. All carbon mast, lots of carbon in the boat itself. She took a substantial hit on the mast while lying in her slip. The crew working on board were unscathed, but at last account the mast was a write-off due to structural damage, as were all the electronics. There were indications that the hull itself had suffered damage as well. Big repair bill, including trying to get in the schedule to have a new monster carbon spar built. I think they figured she'd be out action for at least the year.