Well I first experienced this when I was driving on the freeway when the guy in front of me suddenly came to a complete stop when we were going about like 70mph. I wasn't tailgating or anything, but still going at 70mph I didn't realize he was going to stop so sudden and I stepped on the brakes kinda hard and then they started bouncing. The brake pedal bounced or like went up and down and also the sound came along with it. I don't know if something is wrong with my brakes or not but it still happens every once in a while even when I don't brake hard.

My friend said it's the ABS, I'm not sure so just checking

 

it is the ABS

 

Oh so it is normal for that to happen? thx for the info.

 

I feel the pedal vibrate when I'm braking and I go over a pothole or something... it's the ABS

 

Yeah dude, the ABS. It pulsates the brakes to prevent your car from locking up the wheels. lol what were you doing going 70mph. and next time just stomp on the brakes since you got ABS, don't have to worry about skidding.