Karl Zimmerman wore an old Minnesota Vikings No. 4 Brett Favre jersey to his first NFL game on Sunday.

“It was a childhood dream,” Zimmerman joked as he spoke with with USA TODAY Sports from jail.

Zimmerman was one of two Dakota Access oil pipeline protesters who climbed to the roof of U.S. Bank Stadium in the second quarter as the Vikings hosted the Bears and unfurled a banner that featured a U.S. Bank logo and the words, “Divest #NoDAPL.”

“I hope (the protest) will get more people talking about the pipeline,” said Zimmerman, a Minneapolis resident. "The construction needs to stop. We just can’t keep building these pipelines that continue to leak, spoiling waterways and poisoning the ecology around disadvantaged populations.”

U.S. Bank spokesperson Dana Ripley declined comment.

Zimmerman, 32. and fellow climber/protester, 26-year-old Sen Holiday, hung from atop the stadium for about two hours until they climbed back down a built-in ladder and onto the catwalk after the game concluded. They were arrested and remain jailed on Monday morning on burglary and gross trespassing charges, both misdemeanors.

Minneapolis police also arrested a third protester, 27-year-old Carolyn Feldman, on a misdemeanor obstruction charge. She also remained in custody as of Monday morning.

Zimmerman declined to comment on how he and Holiday were able to sneak their climbing gear past stadium security.

“I don’t want to talk about my personal endeavors,” Zimmerman said.

The Dakota Access pipeline (DAPL) is currently on hold after the Army Corps of Engineers said in December it would not grant an easement of the final stretch of the 1,172-mile line, which would carry oil from North Dakota to Illinois. Hundreds of protesters have gathered near the Standing Rock Sioux, where the pipeline would cross the Missouri River, for months and activists have also sought relief from the courts to halt the project.

The banner Zimmerman helped unfurl remained in place well after the Vikings-Bears game concluded.