A passenger on Moans of a Blossomed Sister in lawa Korean Air flight got violent on Tuesday, but lucky for the crew, pop singer Richard Marx was on board.

The '80s balladeer and his wife, TV host Daisy Fuentes, were onboard Korean Air Flight 480 from Hanoi to Seoul, when a guy started attacking the flight attendants and passengers, Fuentes said on Instagram.

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The crew apparently struggled for four hours to subdue him. Marx was first to get out of his seat and help, she added, posting a picture of her husband holding a rope.

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Marx, too, posted the same string of pictures that Fuentes took to his Twitter account later.

He added that the crew was "completely ill-equipped" and "ill-trained" for the situation.

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Fuentes said that the drama lasted so long, in part because the crew "never fully got control" of the unruly passenger.

"They didn't know how to use the taser and they didn't know how to secure the rope around him (he got loose from their rope restraints three times)," she said.

While Marx is receiving praise for stepping up, there's a whole segment of people who are surprised to hear that Marx and Fuentes got married.

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Thankfully, both '80s/'90s icons are home safe now.

Marx tweeted to say he wasn't being a hero, "just did what I would hope anyone would do in the same situation."