He was soused and doused.

A 20-something Circle Line passenger was three sheets to the wind when he started shooting off fire extinguishers during a concert cruise Saturday night, a witness said.

The boozed-up man saw only one way to flee Circle Line security guards: A desperate dive into the drink.

Police pulled him from the Hudson River near Chelsea Piers around 11 p.m. He’s unlikely to face any charges, said cops.

As on the Titanic, the music continued. “The show must go on,” said Marcus Geard, bass man for The Slackers, the rock band that played the cruise.

The Slackers have been playing concert cruises for 14 years, and this was the first time an audience member jumped off a boat, Geard said.

“At the end of the show we made the announcement that everyone was OK and no one was hurt,” he said.