If I am driving and I pull up gently on the handbrake an extremely loud "POP" or SNAPPING noise will be heard.  As if something is breaking free .  Pulling up the handbrake again will yield a much softer POP noise.  I know nothing about the (probably) very simple emergency break system in these cars.  Any ideas of what may be causing the "POP"? 
 
 
2000S Manual