Details are coming out today on what happened when a man went more than a little crazy on a United Airlines flight from Hong Kong to Newark Liberty Airport in New Jersey.

In audio recorded aboard the plane, the man - who thought he was being poisoned - can be heard repeatedly screaming, "Somebody help me!" Not long after, passengers took matters into their own hands and tackled him to the floor.

"He was very paranoid," said one fellow passenger. "As soon as he started screaming, people started looking at him, and then when he started reaching for his pockets, people got scared and a few of us jumped on him."

He was tied up for six hours on that flight and taken to the hospital for a psychiatric evaluation when the plane touched down.