I've been through having the master cyclinder break through my clutch pedal before, talk about a pain. Luckily, I was in neutral, trying to shift into gear, when I pressed the pedal, it went through the pedal, and had to pull over. Being that I was not in gear, and no traffic, proved there was a god lol the pedal was around $200 bucks from the dealer, also replaced the master cylinder for around $100. the pedal wasnt too bad to replace, beside the fact that the pedal had that extra section sticking out the top which I chopped off. The master cylinder however, was an all day replacement, plus not knowing the clutch is vacuum bled.
fun times lol