All the cars were stopped in traffic, and they were coming off a ramp. As soon as traffic started to inch forward, they sped across two lanes, cutting in front of people and almost crashing into me if I had not slammed on my breaks. I beeped my horn when they were about to hit me and they just cheered and danced. They seemed to be young. Had I not slammed on my breaks, they would of crashed into the whole passenger side of my car.