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Jeff Probst has a hidden talent that he's finally unleashed on the world.

In an upcoming episode, the host of The Jeff Probst Show croons an impromptu theme song while his guest Derek Amato -- who became an accidental piano prodigy after suffering a severe concussion -- composes music on the spot.

VIDEO: Behind the Scenes of The Jeff Probst Show

Watch the clip to see the spur-of-the-moment jam session with Probst and Amato, who became a concert-level pianist even without taking lessons or being able to read music.

The full episode of The Jeff Probst Show -- which also features Dallas Mavericks owner and entrepreneur Mark Cuban -- airs Thursday, October 4.

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