This sounds more like a scene from "Airplane", but it's even better because it's real.
A 68-year-old Minneapolis man pleaded guilty in federal court to head butting and spitting on another passenger during a flight from Amsterdam to Minneapolis on Northwest Airlines. His plea agreement didn't explain why he thought it would be wise to head butt someone on an airplane.
The incident happened in July 2008. Abdalla Abdi Haibe pleaded guilty to one count of assault. He could face up to six months in prison for the attack.