United Airlines is apologizing yet again after a video showed an airport employee at Houston Bush Intercontinental Airport shoving a 71-year-old customer to the ground.

The video was shot in 2015, but only surfaced now after the victim, identified as Ronald Tigner, filed a $1-million lawsuit against the airline.

“This is just one of the most inhumane things I’ve ever seen in my life,” Tigner’s attorney, William Hoke, told KPRC in Houston.

According to reports, Tigner said he was shoved to the ground after asking the employee to change his boarding pass. After falling, Tigner laid on the ground “lifeless for several minutes,” Hoke said, adding that no United employees came to assist Tigner. As is seen in the video, he was helped up after a fellow passenger came to his aid. A different United employee called 911 several minutes later, but allegedly did not inform the dispatcher of how the incident occurred.

“It’s astounding,” Hoke told KPRC. “It’s outrageous.”

While Tigner is asking for a large sum of money in the suit, according to Hoke, his client merely wishes to bring attention to the incident and see if there are others out there who have been victimized by the airline, like Dr. David Dao, who was infamously dragged off a United flight earlier this year.

"We want people to come forward who've been treated just like Mr. Tigner and like Dr. Dao, any of the other people who've flown United and been treated this way, because this has to stop," Hoke said.

United acknowledged the incident in a statement, apologizing for the incident and noting that the employee involved is no longer with the company.

“We have seen the video from 2015 that shows completely unacceptable behavior by a United employee. This employee was terminated from United in August 2015 following the incident,” the statement read. “The conduct shown here does not reflect our values or our commitment to treat all of our customers with respect and dignity. We are taking a thorough look into what happened here and reaching out to our customer to profusely apologize for what occurred and to make this right.”