(CNN) -- Two men, shocked at what they saw, describe an unarmed teenager with his hands up in the air as he's gunned down by a police officer.
They were contractors doing construction work in Ferguson, Missouri, on the day Michael Brown was killed.
And the men, who asked not to be identified after CNN contacted them, said they were about 50 feet away from Officer Darren Wilson when he opened fire.
An exclusive cell phone video captures their reactions during the moments just after the shooting.
"He had his f**n hands up," one of the men says in the video.
The man told CNN he heard one gunshot, then another shot about 30 seconds later.
"The cop didn't say get on the ground. He just kept shooting," the man said.
