Take a sneak peek at the first-ever roller coaster at sea

Just went you think cruise lines can't get any more extreme, they go ahead and put a roller coaster on board.

Behold the Bolt Ultimate Sea Coaster. It's the first-ever coaster onboard a cruise ship and will debut on the Carnival Mardi Gras.

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Bolt offers almost 800 feet of twists, turns and drops with riders reaching speeds of nearly 40 miles per hour.

The electric roller coaster holds two riders in a motorcycle-like vehicle to race along a track 187 feet above sea level with 360-degree views.

Carnival Mardi Gras will sail from Port Canaveral, Florida, in 2020.

(Editor's note: This story originally ran on Dec. 24, 2018.)