“This is the Gibbs Quadski, an amphibian that operates as both an ATV and a personal watercraft. Although it looks like set dressing for HBO’s Eastbound & Down, we can attest that the Quadski is real—Gibbs says it will be on sale by mid-November. It would be the first amphibious vehicle brought to market by the private company after more than 15 years “in business” and total expenditures, it says, have topped $200 million.”

http://www.caranddriver.com/reviews/2013-gibbs-quadski-first-drive-ride-review

http://www.gibbssports.com/

http://www.youtube.com/watch?v=lINWPO2Ztlg&feature=player_detailpage