PARIS (AP) — When the bare-chested gunman suddenly appeared aboard the speeding Paris-bound train, laden with weapons and his mind allegedly filled with Islamic State group propaganda, passengers at first were stunned.

Then, they sprang into action.

"‘You’re not going to sit in the corner and die,'" is what British businessman Chris Norman recalls telling himself on Aug. 21, 2015 as he steeled himself to act.

“I was terrified when I first saw him coming up the aisle, but then I got angry," the 67-year-old recalled Thursday in an interview with The Associated Press before he testifies at the attack suspect's trial in the French capital.

The thoughts of another passenger who helped thwart the attack on the train that day, French-American citizen Mark Moogalian, weren't for himself but for his wife when he lunged for the gunman’s Kalashnikov rifle.

“I was trying to protect Isabelle,” Moogalian said, also speaking Thursday before he testified in Paris. “There was no way I was going to let anything happen to her. I was going to do my best.”

The recollections at the courthouse from passengers who disarmed the alleged Islamic State operative on the train traveling from Amsterdam highlighted the split-second decisions that foiled what could have become a mass slaughter. The passengers' heroics inspired Clint Eastwood to direct a Hollywood movie reenacting the dramatic events: “The 15:17 to Paris.”

“My first reaction was panic, put yourself in a protective ball and hope nothing happens,” Norman said. Then, “I came to the conclusion that really I had to move, I had do something.”

The attack suspect, Ayoub El Khazzani, faces a maximum sentence of life in prison if he is convicted of attempted terrorist murder. The 31-year-old Moroccan is being tried with three suspected accomplices.

At the trial's opening earlier this week, defense lawyer Sarah Mauger-Poliak said El Khazzani “regrets having allowed himself to become indoctrinated” by extremist propaganda.

Authorities say El Khazzani boarded the train in Brussels armed with the Kalashnikov, nine clips with 30 rounds each, an automatic pistol and a cutter. Once aboard the train, El Khazzani lingered in a restroom between cars and then emerged bare-chested with his weapons, according to investigators.

Norman told the AP that while other passengers were hitting and trying to choke the gunman, he kept a grip of his right arm and looked into the man's eyes.

“I said to myself, ‘What have they done to this guy? What have they done to this guy?’ His eyes were completely black. He had eyes devoid of humanity,” he said.

“As soon as he started trying to take out his handgun, I took his arm,” Norman continued. “There was one thing I didn’t want, which was for him to take his gun and use it to escape.”

Testifying in court Thursday, one of three Americans who tackled the gunman, Anthony Sadler, said: “It was an intense fight. It was hard to get him under control, even (with) the three of us. And he kept pulling out weapons.”

Had they not acted, “He would have shot everyone in our train car” and likely moved on to the next, Sadler added.

Moogalian said the courtroom proceedings are allowing him to piece together the blur of events from that day.

“Everything happened so fast. There was so much confusion,” he said.

His wife, Isabelle, said subduing El Khazzani was "a five-man job” and that she regarded her husband as a hero. Moogalian wrestled away the Kalashnikov before being shot himself with a pistol.

"They did it together, otherwise everybody would be dead," she said.

Moogalian said: “We were all very lucky. It took five or six of us to to prevent a real catastrophe.”

“All I know is that he shot me and he was carrying plenty of ammunition, enough to kill plenty of people."

The train rerouted to Arras, in northern France, where El Khazzani was arrested.

“I think he just understood that he was not going to achieve the objective that he had come to achieve,” Norman told AP. “We got him under control. There was no point in struggling anymore so he was just going to lay down and wait for his fate."

Another of the American passengers who had been scheduled to appear as a witness was hospitalized Thursday, casting doubt on whether he would still be able to testify about his role in El Khazzani's dramatic capture.

Spencer Stone's lawyer, Thibault de Montbrial, wouldn't give details about what is ailing the former U.S. airman, citing medical privacy.

“I know that he is hospitalized. I don’t know why. I don’t know how he is,” de Montbrial said.

"The only thing I’m certain of is that he is not in a state to testify today. We are going to regroup this evening to gauge whether he can be heard tomorrow morning or afternoon,” he said.

Stone has said he was coming out of a deep sleep when the gunman appeared. He and Alek Skarlatos, then a 22-year-old member of the U.S. National Guard recently back from Afghanistan, snapped into action, tackling the gunman.

Skarlatos and Norman are scheduled to testify Friday.

“To be quite honest, same thing happens to me again, I don’t know whether I’d do it,” Norman told AP. “If you listen to the different testimonies of the people in the trial, quite a few of them didn’t realize that they were capable of what they did.”

___

AP writer Elaine Ganley contributed.

___

This story has been corrected to show the spelling of the French-American witness’ last name is Moogalian, not Magoolian.