They're not autistic. Kids with autism usually flap their hands as a stim, usually for a visual stimulation caused by the movement of their hands, not in reaction to anything. Hand flapping during excitement/anger is usually excess energy looking for a way out. A form of expression. Many 3 yr olds don't play cooperatively with others at school.
That year one of the most influential rappers to ever hold a microphone released his breakout album. In January 1993, Tupac Shakur was 21 years old. He was about to drop his second album, and the first feature film he starred in had been a success. He was on the cusp of superstardom. Kevin Powell, a young journalist at Vibe magazine, was trying to talk his editors into taking a story.
On September 7, 1996, at approximately 11:15 pm, Tupac Shakur was struck by four of twelve or thirteen shots fired from one vehicle to the next in the middle of the street, with bullets hitting him in the chest, the pelvis, and his right hand and thigh. One of the rounds apparently ricocheted into Shakur's right lung.