Boston Duck Boat Heckles Tour Guide Steve Kerr – NBC Boston

To know Mike O’Brien is to know he’s a huge fan — and advocate — for all things Boston sports.

He also recounts for Boston Duck Tours, which is exactly what he was doing when he saw Golden State Warriors head coach Steve Kerr on one of the city streets.

Kerr is, of course, in town for Games 3 and 4 of the NBA Finals.

O’Brien tells NBC10 Boston that the duck was hit in traffic in Back Bay earlier this week with a boat full of tourists when he spotted Kerr.

“When you heckle an NBA world champion coach, you don’t really think,” O’Brien said. “Immediately I flipped a switch and started going, ‘You know what we do in these ducks?'”

“It was a lot of fun and it was just one of those, I can’t believe this stuff is happening,” he added.

The energy is building outside the TD Garden with Game 4 on Friday night, and the whole town is bleeding green. Celtics fans don’t want to jinx it, but they say the #18 banner is so close they can smell it! Two of those fans are Max Kirwan and Jeb Fahour, who flew 20 hours from Melbourne, Australia, just to be in Boston for games three and four.

And O’Brien says Kerr fired him.

“He said something about the fact that we haven’t done anything since the ’80s, which is statistically incorrect because we’ve done everything in a duck, including the Celtics winning in 2008,” O’Brien said.

Of course, the Ducks are the race of champions here in Boston, including in 2008 – the last time the Celtics won it all.

O’Brien is ready for history to repeat itself and for the Celtics to get the No. 18 banner.

“Let’s launch the boat ducks!!” he said. “There’s no curse, the Celtics are going to win, there’s no other reason, we’re having a parade and I hope to be in that parade in some capacity.”