U.S. welterweight Charles Radtke talked smack about Canada, then got smacked silly by Canadian Mike Malott in their UFC bout in Montreal on Saturday. (Watch the videos below.)

Malott (12-2-1) floored Radtke (10-5) with a left hook in the second round and rained punches on the American as he lay on his back before the referee stopped the bout.

With tensions between the U.S. and Canada at perhaps an all-time high due to President Donald Trump’s tariffs and talk of annexing Canada, Radtke ratcheted up the adversarial hype during a prefight press conference.

He referenced Canadian hockey fans who booed the “Star-Spangled Banner” before the Americans played in the same arena during the 4 Nations Face-Off in February.

“I don’t give a shit about hockey,” Radtke said. “That’s not my gig. But what I do hold dear is I grew up on a bison ranch with my grandfather, who’s a sergeant major in the Marine Corps, and when you all booed the national anthem, somebody’s going to have to pay for that.”

The American also refused to shake Malott’s hand at one point.

But the victor took the high road when boos erupted for his opponent in the post-fight interview. (Fans repeatedly chanted “fuck you, Radtke” during the bout.)

“Hey, no, don’t boo him,” Malott said. “We’re celebrating now. That’s done. We’re cheering. This is our time. No negativity, just positivity, baby. And when it comes to defending this country in the octagon, know one thing, Canada: I stand on guard for thee.”

Malott’s tailoring of a line from “O Canada” was a knockout.