A man dressed in drag as Queen Elsa from the movie “Frozen” ran out of a bar Tuesday night to help a Boston police wagon stuck in the piles of snow left by a nor’easter that hit the region.

As onlookers cheer, Elsa pushes the wagon, then hikes up her gown to get a better angle, a video shows. She directs the wagon backward and forward and even bends down to clear snow away from a tire with her hands.

Christopher Haynes, a restaurant publicist, was at The Gallows bar Tuesday evening during the snowstorm. In the packed bar, he saw a man he knew walk in wearing an Elsa costume.

“My neighborhood is a little colorful, so I didn’t think too much of it,” Haynes said. “Two minutes later I saw Elsa outside. You can’t make this stuff up.”

He decided to take a video of the heroic feat.

Bar patrons whoop and holler for Elsa, identified by the Boston Globe as Jason Triplett, 37, a lawyer who told the Globe he bought the costume last year and wore it to the bar as a gag.

In the video, patrons scream “Come on, Elsa!” and “Let him go!” as they chuckle in disbelief.

And they cheer wildly when the truck drives away. Elsa takes a dramatic curtsy.

On social media, the other bar patrons were criticized for not going out to help. Haynes said they were too stunned.

“I feel a little guilty we didn’t help push,” Haynes said. “But Elsa had it taken care of, clearly.”

Navigating the city won’t be the only challenge posed by the heavy snow. The time required to remove it could force the cancellation or postponement of the annual St. Patrick’s Day Parade, according to Boston Mayor Marty Walsh.

Walsh said no decision has been made yet, but at a minimum the parade route may be altered.

The parade, organized by the Allied War Veterans’ Council of South Boston, brings between 600,000 and 1 million people to the city each year. It’s scheduled for Sunday.