Nope, you need your arse wedged into a high bolster bucket which is on or near the floor and preferably toggle trim for a footie.
On a jockey, the throttle would be on and off like a light bulb in big sea. The result would be a laugh to watch, but 'orrible to experience.
A pal and I clowned about with Phantom race rigs years ago. The quickest was a 20 with a 2.5ltr Bridgeport, bloody scary around 70mph.