From Straights Times:

A flier aboard Sunday’s Swiss airline flight – a 57-year-old Chinese man […] felt disturbed during his meal when the passenger in front of him reclined his chair.[…]

“The older of the two felt disturbed during his dinner. When the younger did not respond to his protests, he hit him on the head with the flat of his hand. It was a real slap,” said the guide, Ms Valerie Sprenger.

A fight then broke out between the two men, who rolled in the plane’s aisle. A crew member and a well-muscled passenger restrained the aggressor, bound his hands and placed him at the back of the plane, where he shouted for an hour, the newspaper said.

I can sympathise. In fact I’d have probably tied up the douchebag who put his seat back during meal service.