Riverboarding is believed to have originated in the late 1970s.

Riverboarding is a dangerous activity and should not be undertaken by novices without the appropriate equipment and training.

The adrenaline-pumping edge attracts the majority of riverboarding initiates - young men or bored rafters, said outfitters.

Riverboarding is a boardsport in which the participant lies prone on their board with fins on their feet for propulsion and steering.

Riverboarding includes commercial, recreational and the swiftwater rescue practice of using a high-flotation riverboard, designed for buoyancy in highly aerated water.

In fact, the United States Riverboarding Association was established in 2005, and global competitions are growing in popularity, including in the United States.

"I don't expect that riverboarding will ever get as big as surfing or Boogie Boarding," Zalinskas said, noting that the company sells "hundreds of thousands" of Boogie Boards every year.