A passenger on a Frontier Airlines flight bound for Houston punched a window hard enough to break the plexiglass according to a video passengers took, which was obtained by ABC13. Passengers aboard the flight from Denver to Houston this week told ABC13 the passenger's fit of rage began after another passenger asked him to exchange seats with her.

"He was scary," a witness said. "He started kicking profusely and started punching the window." Passengers on board restrained the man with zip ties and a shoelace.

A man aboard a Frontier Airlines flight was restrained by fellow passengers on Wednesday after damaging the plane window, officials said.

After the man began to have what other passengers called a mental health crisis several male passengers moved in and restrained the man sand guarded him for nearly two hours until the flight landed in

A passenger who appeared to be experiencing a mental health crisis punched out the plexiglass of a window mid-flight.

A passenger aboard a Frontier Airlines flight to Houston had a violent outburst on Wednesday after being asked to move, punching and kicking in his seat until he cracked one layer of the plane’s window mid-flight.

"He was scary," a witness said. "He started kicking profusely and started punching the window." Passengers on board restrained the man with the only tools they had available: zip ties and a shoelace.