Every political candidate has to learn to work a crowd.

Graham Platner took that idea to a different level on Monday night, by diving into and surfing on top of the crowd at a Dropkick Murphys show at the State Theatre in Portland.

Platner, a Democratic candidate for U.S. Senate, can be seen on videos being pulled out of the crowd and onto the stage by Dropkick Murphys lead singer Ken Casey. He then puts his arm around Casey and joins him in singing “Bury the Bones,” a song with a Celtic rock sound and working-class hero lyrics, including the line: “Resist and never comply, protest and organize, the people must have the power if the world is meant to survive.”

After energetically singing and shouting on stage for a few minutes, Platner briefly consults with Casey, then spreads his arms and dives onto the jam-packed crowd. He’s given a ride on by dozens of hands, briefly, then disappears from the camera’s view.

Platner posted on Instagram to thank the Boston-based band “for always standing up for the working class” and said it was “incredible to stand up there with you tonight.”

Platner, a Marine veteran and oyster farmer from Sullivan, is challenging Gov. Janet Mills in the Democratic Senate primary for the right to face incumdent Republican Susan Collins in November. His campaign has focused on promoting him as a champion of working people, despite an upper middle class background.