Just got back from Cat @ 50K...Joe styled the big drops (20-30' waves, holes, etc) in his cat with a hero line to boot....the rig flipped right after that with a different rower in not so big (under 20' waves).
Took 6 people to get it upright. Ohh, and all the hard shit on the deck and oar rig flipped violent enough to bash a boater in the head...there was blood.
Anyway, depends on the rower I guess.
I've never boated before, but I have posted a lot on Mountain Buzz!