[Dirty Rooster]

1993 940 with hydraulic clutch.
It's happened twice now, clutch pedal to the floor, clutch engages but abruptly ... gives me palpitations ... few seconds later and the clutch is working normally as if nothing was ever wrong.
Once was in Aldi carpark going from reverse to first. I thought the cable had snapped! Then it was working again ... confusing.
Second time was a warm car, going from third to fourth gently, lowish revs, straight road. Less of a panic, hasn't happened since.

I'm going to have a look at the fluid as the first-stop to detect the problem,
I might want to buy some of that there really good synthetic modern stuff before I do ...

Recommendations here??