I saw this in a Rick White book as well and thought it was A. Neat B. Crazy. He explains using a boswains chair to do it.
Jeeze...you youngsters need to get out and do stuff. Spinnaker flying is as old as spinnakers. You really don't need a 70 footer, but that would be awsome.
Even a 30 footer will give you a high. With 15-20 knots of wind you can get higher than the speaders.
Your trap harness works better than a bosun's chair.
