My Honda S2000 Clutch pedal thumps as I press down on it as if it gets stuck for a quick second. Why?

I think it got worse, not when I try to Press all the way down on the gas on the free way to go fast, the RPMs shoot way faster and the MPH moves very very slowly? Any ideas?

The pressure plate and the friction clutch disc are going south. Time for a complete clutch job.