By Oh Young-jin





Richard Marx inside the Korean Air flight / Courtesy of Facebook

Korean Air will thank American singer Richard Marx for subduing an unruly passenger.

A Korean Air official told The Korea Times Friday: "We appreciate Mr. Marx's heroic act. Our appreciation will likely be delivered in a letter."

He did not say whether the airline also would hold a ceremony or provide the singer with a monetary token of appreciation.

A video clip of a Korean in his 30s going berserk on the plane went viral on Wednesday. In it, he was captured spitting on and kicking crew members on a Tuesday flight from Vietnam to Seoul. Marx, 53, intervened to restrain him.

The singer's hit tunes include "Right Here Waiting" and "Should've Known Better."