Discription of Events: We were getting off 225 northbound off on Yosemite. The driver got out of the lanes to cut us off and drove on the lane where you should park if your car isn’t working. When he drove past us he got in front of us and stepped on his brake really fast and almost caused us to crash into his car. We tried to move to another lane be he swerved and got in front of us again and stepped on his brakes. This happened like 4 times until he was almost vertical he pulled his window down and said he was going to kill us and shoot us down and find us. He then he is hand like a gun and said again he was going to kill us. He made a right turn on Yosemite and sped off. The guy was black, looked like he was in his 20s, dreads that went to his chin.