Tonight I was at a stoplight I had my car in first with the clutch in and my foot on the brake as I was stopped on a slight incline. The car in front of me pulled forwards about 3 ft so I let out the clutch and feel a weird shudder through the pedal but my car rolls forwards a bit. When I pushed the clutch back in the pedal felt funny, I can't describe it but it just didn't feel normal and as I press the brake the car started to shudder like it was going to stall. I pulled it into neutral, put on my hazards, and started pumping the clutch trying to make the strange feeling go away. The light turned green I had about 20 cars behind me so I pushed the clutch to the floor and pushed it into 1st gear with alot of pressure. It grinded and the revs dropped then it popped into gear and the car started to move forwards even with the clutch to the floor. I limped the car into a parking lot and walked to class. After class (3 hours later) I come out to my car and I start it. I tried the clutch and it felt fine. I went through each gear with it in and there was no problems, the car felt perfect. I decided to risk bringing it home. After about 20 minutes of driving it started acting up again doing the same thing. I left the car in 3rd and drove it home without making any stops or gear changes. I decided to test the clutch and brought the car from 3krpm to 6krpm at WOT without any slippage at all. Im not sure what this problem could be but the car definately isn't driveable.