violent yet. a warning, some of these images are disturbing. reporter: a bloody brawl breaking out on board a flight to california again. passengers on board a delta plane in atlanta watching in horror friday morning. atlanta police reporting a 30-year-old man got upset when the passenger behind him placed something in the seat pocket, curtis clayton then throwing punches before another passenger restrained him. delta releasing this statement, civility at our airports and on our flights is something our people and customers deserve always. this is happening far too often. reporter: the violence falls less than 48 hours after more bloodshed that forced american airlines to make an emergency landing. we had one of the worst displays of unruly behavior we ever witnessed. reporter: according to sources, this man punched the