Copying from ntsb.gov accident report.

A HUGHES 269B went out of control and collided with the ground during a T/O to a hover. The pilot had purchased the aircraft recently and was learning to fly it. He was scheduled for his first flight lesson on the day of the accident. The CFI reported that he had told the student pilot to wait for him and not to touch anything. While waiting for the flight instructor, the non rotorcraft rated student pilot started the aircraft, ran it up to full rpm, and then began to increase the collective pitch control. The helicopter climbed vertically to a high hover and the pilot lost control. The pilot stated that he had not released the cyclic friction before becoming airborne. The pilot indicated he had about 500 hours of flight time but did not specify the type and no substantiation of the time could be made.