ISIS sympathizer Omar Mateen laughed as he killed terrified clubgoers hiding in a bathroom stall at a Florida hotspot, according to a family friend of one of the massacre survivors.

“He was laughing frantically as he was spraying people with his gun,” pastor Deyni Ventura told The Guardian.

Ventura said she is friends with the mother of a clubgoer named Norman who barely escaped with his life on Sunday morning.

“[Norman] was in a bathroom stall with 30 other people, and those 30 other people are deceased. He is the only one that lived,” she said.

Ventura said she visited Norman and his mom Vanessa at the Orlando Regional Medical Center, where the 26-year-old has been recuperating from four gunshot wounds to his back.

Despite numerous red flags, Mateen was able to legally obtain a gun:

Norman, who was celebrating his birthday at the club, recounted the horrific scene, saying Mateen seemed to be “making fun” of his murder victims, Ventura said.

“When he laughed, he took his gun and sprayed under the bathroom stall and on top of the bathroom stall, so then the bodies started collapsing and blood was going everywhere in the handicapped stall, 30 people squished in there getting shot,” Ventura said.

“He was laughing like he was making fun of the victims.”

“Then Norman had to climb over the bodies to try to climb on top,” she continued. “He said it was just horrific. While he was getting shot, he felt the shots coming into his skin, he felt the warmth of it and he thought he was going to die.”

Norman made it out when police bulldozed through the bathroom wall with an armored BearCat.

“He said, ‘I’m not the shooter, I’m a victim, I’m a victim’ and he put his hands up in the air, and then they went to him,” Ventura said.

“He said must have some protection system, how did all the people around him die, and he was the only one who survived this bathroom stall?”