The gunman told students that "you're all gonna die" before opening fire at Robb Elementary School, a student who survived Tuesday's mass shooting recounted.

Samuel Salinas, a 10-year-old student in Irma Garcia's fourth grade class, described playing dead with the hopes that the gunman, who announced his intent to kill them all, wouldn't shoot him.

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"I think he was aiming at me," Salinas said in an interview that aired Friday on Good Morning America.

A bullet hit a chair between him and the gunman, with shrapnel striking Salinas's thigh and leg, he said.

"I played dead so he wouldn't shoot me," he continued, adding that other students followed suit.

The gunman was fatally shot by law enforcement officers, who then moved desks out of the way to free children, Salinas said.

"There was blood on the ground," he said, recounting leaving the classroom. "And there were kids ... full of blood."

What started out as a "normal day" quickly turned deadly, and Salinas said he is plagued with nightmares about the shooter and being shot.

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"Whenever there's a lockdown, then I'll be really scared," he said.

Garcia was one of two teachers who died Tuesday, along with 19 students.