DAVE CHAPPELLE " freaks out on airplane???"

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.

Chappelle was spotted wandering out of the hotel early this morning.

A rep for Chappelle explains the incident to TMZ by saying Dave really needed to use the restroom -- he ate something that didn't sit well -- and the bathroom on the plane was "not the kind he needed."

This sounds alot like the incident that happened with martain lawrence.

I hope dave is alright. He seems to be one of the only gOod guys in HOLLYWEIRD.

SHADOWDANCER, what is going on here?