Until about 24 minutes ago, I'd never heard of a pulsejet. Or ever thought of putting one on a kayak. Fortunately, New Zealand has crazy people who can think of insane things like this all on their own so that I don't have to -- all I need to do is just sit back and watch all the fun on YouTube.
It was built by Bruce Simpson, who also built his own home-made Cruise missile.
The video is embedded below in two parts. In Part Two, the pulsejet kayak races against an Olympic kayaker.