The chilling words Santa Fe shooting suspect repeated amid the carnage

PHOTO: A makeshift memorial is seen outside Santa Fe High School a day after a mass shooting May 19, 2018 in Santa Fe, Texas.PlayBrendan Smialowski/AFP/Getty Images
WATCH Texas school shooting survivors on what happened when alleged gunman opened fire

The gunman who opened fire inside Santa Fe High School in Texas Friday morning allegedly repeated "another one bites the dust" during the carnage, one survivor said this morning.

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"He was playing music, making jokes, had slogans and rhymes he kept saying," student Trenton Beazely said of the suspect on "Good Morning America." "Every time he’d kill someone he’d say, ‘another one bites the dust.’”

Eight students and two teachers were shot and killed when 17-year-old Dimitrios Pagourtzis allegedly burst into an art room with a shotgun and a .38-caliber revolver, both of which appear to be legally owned by his father. Thirteen others were wounded.

PHOTO: A man hugs a woman outside the Alamo Gym where parents wait to reunite with their children following a shooting at Santa Fe High School in Santa Fe, Texas, May 18, 2018. Michael Ciaglo/Houston Chronicle via AP
A man hugs a woman outside the Alamo Gym where parents wait to reunite with their children following a shooting at Santa Fe High School in Santa Fe, Texas, May 18, 2018.

Beazely first heard a singular "boom" that morning in art class, he said, which he figured was a textbook falling to the floor. Then he heard two more "booms," after which "everyone just started taking off running,” he added.

Beazely broke into a room where they stored kilns but the gunman found them.

"I could see him running, gun pointed at the door," he said.

As his adrenaline raced, Beazely said, he helped wrap wounds for a victim. It wasn't until after police rescued them that he realized he had been shot.

PHOTO: Trenton Beazely appears on Good Morning America, May 21, 2018. ABC News
Trenton Beazely appears on "Good Morning America," May 21, 2018.

Another student, Rome Shubert, scaled a 7-foot wall as he fled during the shooting, initially not realizing he had been shot in the head, he said.

His mother, Sheri Shubert, "wailed" and "screamed" when she found out her son was in the hospital, she told "GMA.”

PHOTO: Rome and Sheri Shubert appear on Good Morning America, May 21, 2018. ABC News
Rome and Sheri Shubert appear on "Good Morning America," May 21, 2018.

But he wasn't critically hurt; the bullet went through the back of his head and out the side, Rome Shubert said on "GMA." If the wound was anywhere else, he said the doctors told him, he could have been paralyzed or killed.

The star baseball player at Santa Fe High School returned to the field the next day, he said, to "give a little feeling of hope." He wore the initials of the victims on his wrist as he played.

Standing with “GMA” co-anchor Michael Strahan as the sun rose over Santa Fe High School this morning, Beazely said he never thought a school shooting would happen there.

PHOTO: A woman prays in the grass outside the Alamo Gym where parents wait to reunite with their kids following a shooting at Santa Fe High School, May 18, 2018, in Santa Fe, Texas. Michael Ciaglo/Houston Chronicle via AP
A woman prays in the grass outside the Alamo Gym where parents wait to reunite with their kids following a shooting at Santa Fe High School, May 18, 2018, in Santa Fe, Texas.

"You see it on the news happen at others schools, and it's sad until you actually end up experiencing it,” he said.

Pagourtzis is in custody and has been charged with capital murder, officials said.

The suspect allegedly wrote in journals that he wanted to carry out the shooting and then commit suicide, but he gave himself up to authorities, according to Texas Gov. Greg Abbott, who called the shooting "one of the most heinous attacks that we've ever seen in the history of Texas schools."