SPRING BREAK? NO, WHEN YOU PRESS DOWN ON THE BRAKE PEDAL, A LEVER PUSHES A PISTON INTO A HYDRAULIC FLUID-FILLED CYLINDER. WHEN THE BRAKE PAD PRESSES AGAINST THE BRAKE DISC, THE FRICTION SLOWS THE OUTER WHEELS TO STOP THE VEHICLE. IN SOME MODELS, THE CYLINDER PUSHES THE CYLINDER AGAINST THE BRAKE DRUM TO REDUCE YOUR VEHICLE'S SPEED.