I was out sailing a 8 meter long multihull a couple of weeks ago. We attached a bullet cam with gps overlay at the stern and took a trip around the lake, we were above 19 knots on several occasions on the downwind leg. It's a rather big movie but I hope the server can handle it.
http://www.multihulls.org/boats/scarlatti/images/sailing_movie.wmv/hakan
