Discription of Events: The driver cut over in front of my vehicle while I was driving the speed limit of 65 mph on I-71. He proceeded to SLAM on his brakes without any other vehicles in front of him almost causing me to slam into the back of his vehicle. I honked my horn as there was no indication of a reason for him to slam on his breaks. He went on for a few seconds, slamming on his breaks again coming to a stop. He was motioning for me to go around him without having any hazard lights on. My exit was the next one up and I was afraid to go around as it seemed he wanted confrontation or to cause injury. He went on with his vehicle and slammed his breaks again, causing a semi truck to swerve to miss from hitting my vehicle. This driver was extremely reckless and should not be allowed to drive.