I had the same thing happen to me in the bimmer. When I was 14 and it still belonged to my step-dad, he decided to teach me how to drive a standard. I did ok but when I came to a stop, I unconsciously tried to push the brake pedal all the way to the floor like the clutch pedal. We heard a shhhhh!! then the brake went all the way to the floor. It was only about a mile to the house so we went really slowly. Good thing that happened when I was already at a stop and not some time when I might have really needed it! Needless to say, all the lines got replaced.

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Seth

1984 300D 225K
1985 300D Donor body
1985 300D Turbo 165K. Totaled. Donor Engine. It runs!!!
1980 300SD 311K My New Baby.
1979 BMW 633csi 62K+++? Dead odo