A video on YouTube shows the unidentified Marine sergeant going on a crazed, violent-fueled rage at a car driven by 19-year-old Michael McCurdy-Quintana after being rear-ended.
It all happened on the Camp Pendleton Marine Base near San Diego.
According to 10News.com, the woman filming the video "is a wounded Marine. ... paralyzed from the waist down. The driver in the video is the wounded Marine's brother, who is also her caregiver."
McCurdy-Quintana said the Marine cut him off and repeatedly slammed on his breaks, which caused the collision.
"I was prepared to get out and confront the man, but as soon as he said, "I am going to (blank)ing kill you," I immediately locked the doors," he told Inside Edition. "I guess I just went into the "nothing zone." I just listened to the music and blocked him out and just kept staring."
Camp Pendleton officials say the Purple Heart-decorated Marine was detained and given a citation for communicating a threat.
His friends, though, say he has Post-Traumatic Stress Disorder (PTSD).