Last night after letting off the clutch 2-3 times when going into 3 or 4th gear I would get a quick but jerking vibration from the clutch right after I would shift. It was the same feeling as if you hit the brake pedal in a car with bad brakes and you would get a vibration. Has anyone ever experienced this? I only have 3500 miles on the car. I drove it a few miles afterwards and it hasn't happened again.