Driver pulled out infront of me, causing me to nea...

Driver pulled out infront of me, causing me to nearly wreck into their security vehicle during lunch traffic. They then moved over another lane to the left, causing another driver to slam on their brakes. I honked my horn to let them know I was right behind them, and the driver and passenger stared at me and started yelling as if I was in the wrong.. You drive a company "security" vehicle, but act as if you are above the law... Shame on you