A 71-year-old man has taken embattled US airline United to court after he was pushed over by an employee and left lying unconscious on the ground for several minutes.
The footage of passenger Ronald Tigner being pushed over is from July 2015 - but the video has just emerged because of the lawsuit he filed against United Airlines, the man who pushed him, and another United employee.
It shows Mr Tigner speaking to United Airlines customer service representative Alejandro Anastasia, before being shoved over in front of the ticket counter at Bush Intercontinental Airport in Houston, Texas.
His head can be seen slamming onto the ground below - and after a few seconds looking at him, Anastasia simply walks away, leaving him lying on the floor.
Mr Tigner's lawyer William Hoke says his client was actually knocked unconscious in the incident.
"He lies there lifeless for minutes. Not one employee comes to check on him," he told KPRC's Bill Spencer.
"No one even went to check his pulse. They literally left him there like a piece of garbage."
In the full three-minute clip of the incident, not one United staffer offers help, but at about 50 seconds in, another passenger stops to check on him.
The passenger was a nurse, and urged those standing around to call emergency services, Mr Hoke explained.
Upon calling the ambulance, the United employee claimed not to have been aware of why the man had fallen, or whether the man was conscious.
Anastasia has been charged with a felony crime of injury to an elderly person, and was forced to write an apology letter, attend anger management classes and pay a fine.
The footage is the latest in a series of undesirable headlines to hit the airline in recent times, with United's stocks falling sharply after footage emerged of a passenger being violently dragged from his seat went viral in April.