Before Aaron Kreag pulled out his .45-caliber handgun, he was on his way to the movies with his wife.

The couple was driving down Southlake Boulevard in Southlake, Tex., on Friday when they stumbled upon a woman being physically assaulted in the passenger seat of a red car.

Kreag told CBS DFW he saw “this large gentleman just pounding on this lady … My first gut reaction was, ‘Oh my god, this guy’s going to kill this lady.’ ”

According to local news reports, Kreag stopped, pulled his weapon and pointed it at the assailant.

(Courtesy of CBS DFW)

Mistina Doland, who witnessed the confrontation and caught it on video, told CBS DFW: “It was intense not knowing whether bullets were going to start flying from either side of the street.”

“I was yelling commands at him to stop assaulting her,” Kreag told CBS DFW. “He turned his attention to the firearm and was saying, ‘Don’t shoot me, don’t shoot me.’ I said, ‘I’m not going to shoot you. Just stay still. Don’t do anything crazy. The cops will be here any minute.’ ”

Soon the police arrived at the scene and ordered Kreag to the ground and cuffed him, reported CBS DFW. He was released shortly after. The police identified the suspect in the assault as MacMichael Nwaiwu, who was arrested at the scene.

According to the Southlake Police department, Kreag has a license to carry a concealed weapon — but his actions were ill-advised. Police Chief Steve Mylett said in a statement: “While we commend this citizen’s willingness to get involved in order to protect a victim of crime, the Southlake Police Department does not encourage the public to expose themselves in such a manner. Instead, we strongly recommend citizens who witness a crime in progress to contact the local police department by dialing the police emergency number 911.”

Kreag saw drawing his weapon as his duty, he told told CBS DFW. “It’s my responsibility to protect myself and my family,” he said. “If I can help out another person in the process, so be it.”