Found this vid - full speed, spin up right into a rock shoal.
http://vimeo.com/32382270Says it is a min weight F16... Would not want to have that collision on another boat, i have seen a lot of boats ripped wide open with a lot less. They raced back the next day in mid to high 20's, so i guess it was all good less a couple of inches off the daggers and a few scratches.