Happened to me yesterday in gusty Tramontana winds and heavy chop, I bailed out when the foil breached.
Felt a big bang on the tibia but was not too worried, I even got back to shore to change sail and sailed for another hour or so.
Cold water and a tight wetsuit sure give you an anesthetic effect..
Rolled up my suit and saw this, to the bone.
Imagine without 6mm neoprene.....

About 6 lower stitches and 12 superficial, Tetanus shot, antibiotics for 6 days and at least 10 days rest

Remember... first line