Driving N.Bound on Hwy 270. Traveling 50-55 mph. Mores than 2.5 sec from car in front of me per my dash board. Car in front slammed on brakes but did not come to a complete stop. My Braking system kicked and started slowing me down. The car in front of me started accelerating again at this time I was doing 10-15 mph. She slammed on her breaks again and my breaking system kicked in again but I also slammed my foot on the break. My car did not stop immediately it felt like the braking system had control over how fast I could stop my car. When my car was towed to the shop I had mentioned it to the shop workers but not much was said after that