First time, cherry drag event at Capitol RW Sep 12.
I'll divulge how bad I am in separate post!
This is a stock Z on stock tires, with 5k miles and fewer than a dozen hard launches.
Problem.
5th pass (not long after 4th) I get good (for me) launch, then some judder, then revs and no speed in 1st (I think I'm spinning...

get second (no powershift), same (I smell something - think it's tires), get third ... and figure out my clutch is slipping (and smelling badly), so I shut down, coast thru, ease back, pick up slip, and park on the cool down line.
I talked to a couple guys (Mike Siska was there and speculated that I might have been riding the pedal between shifts and heating the clutch ... and he may be right)
I read all the threads on clutch pedal staying on floor ... did not experience that.
Did not run again, functioned fine going home. I tried downshifting third to second about 30 with no throttle ... clutch bit fine and skidded the tires on deceleration.
Did a DE at Summit Fri, Sep 17 ... no problems ... two sessions in rain, two on damp/dry track, so worked the clutch up and down on acceleration/deceleration ... no problems.
Did lo speed AutoX Sun, 19th ... again no problems.
Methinks I might have heated the clutch and/or clutch fluid on 4th run, and it didn't have enough cool-down time going up for 5th run

SO ... should I not worry about it, work on technique, pay attention to my feet, and go out again?
(I intend to replace clutch fluid with Motul RBF this fall)