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.
Rap music is a young manâs game. In history, most famous rappers were all under 25 years old. For example Tupac was killed at 25 Notorious B.I.G. was 24. Lil Wayne got famous with Hot Boyz and he was also under 25. Of course some of biggest rap stars are still making hits like E-40 and Jay-z. But they got famous before 25 like all did.