RELATED: United should be held accountable, union says

A man who refused to surrender his seat on an overbooked United Airlines flight on Sunday was dragged off the plane by security, according to multiple videos and eyewitness accounts.

Four passengers on a flight scheduled from Chicago to Louisville were asked to take a flight the following day so United employees could take the seats in order to arrive in Kentucky in time for their next flights, Courier-Journal.com said.

The woman who shot one of the many videos, Audra D. Bridges, said United offered passengers $400 and a free night in a hotel to take a flight at 3 p.m. Monday. When no one said yes, the airline doubled the offer to $800. Again, no one accepted the deal.

Then, United said a computer would randomly choose which passengers had to depart the already-boarded flight.

Two gave up their seats willingly, but another passenger, a man who said he was a doctor, would not give up his seat when asked to leave the flight. The video shows him being approached by security, tossed against a metal armrest and then pulled from his seat and and dragged down the aisle as he screamed and other passengers looked on in horror.

The bloodied, disoriented man was eventually allowed to re-board flight 3411, which took off O'Hare International Airport two hours behind schedule.

The man was unwilling to give up his seat because he had patients to see in the Louisville-area early Monday.

United CEO, Oscar Munoz released a statement on Monday.

United CEO response to United Express Flight 3411. pic.twitter.com/rF5gNIvVd0 — United Airlines (@united) April 10, 2017

Social media buzzed with reaction, as angry people lashed out, with some calling for a boycott of the airline.

@united thanks for teaching me to fear the term "Re-Accommodate". More importantly, to never again invest in your business. #boycottunited — Kimberly (@kimferguson2002) April 10, 2017

Last month, United Airlines faces a social media uproar when three girls wearing leggings weren't allowed to board a flight. The airline defended the move, explaining that the three were girls were turned away because they were "pass riders" -- friends or relatives of an employee who can travel for free or at a heavily discounted price on a standby basis. "Pass riders" must adhere to a dress code.

United asked law enforcement to assault the man. Their plane, their responsibility. They have more to apologize for than re-accommodation. — Camille Beredjick (@cberedjick) April 10, 2017

Jeff Goldman may be reached at jeff_goldman@njadvancemedia.com. Follow him on Twitter @JeffSGoldman. Find NJ.com on Facebook.