Cracking sound from my brake

[highwaypass]

I just realize that every time i hit the brake pretty hard,the brake will sound like some parts cracking together. Anyone knows what is it? Is it dangerous?

[jambo101]

As the braking system on the car is a major player in your continued existence i'd get it checked out fairly soon.I cant add any info on what might be happening but it doesnt sound good. might be a pebble caught between rotor and pad.