Clutch pedal sunk when launched

Originally Posted by equalme

So today I decided to play around a little bit and work on my launching.

I went a bit too aggressive on one launch...3.3k rev and let out the clutch pretty fast, revved up to 6k and dropped it into 2nd...rpm shot up and my clutch pedal was sunk halfway down. I let off and the clutch pedal came back up after 10-15 seconds. I drove around normally afterwords and didn't notice any other problems.

Is this the notorious CSC problem? Possibly low fluids? (I haven't had the chance to check yet)