So I was driving to work this morning and had to make a relatively hard brake because some guy decided to switch lanes at last second. However while I was in the state of pressing the brake in I guess there was a change from old to new payment and thus was a bump, nothing extreme. As the car hit the bump I felt the brake pedal push back. This is the second time this happened to me and I have never experienced this on any other car before. Both times the situations were same a heavy braking over a bump (not extreme) resulting in the brake pedal push back against my foot. This is not a light push btw.
Any thoughts? Has someone experienced this before?