Popping sensation from brake pedal under braking?

[raptoranderson]

Sometimes when I apply the brake, the brake pedal pops down to the floor as if pushing the pedal through a series of small bubbles rather than depressing slowly. Is this normal or does something need oiling or could it even be air in the brakelines?

 

[frank]

a/b/s ?

 

[raptoranderson]

Hmm maybe .. but what purpose would that serve? I really dont understand the benefits of an abs system

 

[boy blue]

stops your wheels from locking up reducing the likely of ur car skating away whilst braking enabling safer stopping and reduced stopping distances.