From TMZ:

A private jet carrying comedian Dave Chappelle made an emergency landing in Pittsburgh last night because the pilot couldn’t handle Chappelle’s erratic behavior, TMZ has learned.

A source extremely familiar with the incident tells TMZ Chappelle boarded a private jet in New Jersey last night bound for Ohio — where the actor lives.

During the flight, we’re told Dave “freaked out” and refused to put his seat belt on. Then — according to sources — Dave repeatedly walked into the cockpit, asking how much longer the flight would be, and started grabbing the pilot’s arms.

Sources say the pilot determined Chappelle was a safety risk and diverted the plane to Pittsburgh.

We’re told Chappelle then checked into a nearby hotel for the night. Sources at the hotel tell us Dave has been telling hotel employees he wanted to rent a car to drive back to Ohio … only he couldn’t remember where he lived.

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