We have a Flow Rider here aboard Freedom of the Seas. Time is set aside for lessons for those who would like to learn and other times are available for experienced riders.
I have a series of still images here of two people learning the skills, then a video at the end that includes the sound as well as the action of a third person on the board.
Now here's a video that gives you the sound as well as the sights:
It sure looks like fun! Would you like to do this?