I have attempted a few lumbar punctures (AKA "spinal taps") during my 6 months as a doctor, but none of them had been successful until just a few short weeks ago.  That was when I got my first champagne tap.

(Champagne Tap: Successfully performing a lumbar puncture so that cerebrospinal fluid is obtained and is not contaminated with blood, thus having the appearance of a champagne color.  Often reserved for a specimen that has zero red cells on microscopic exam, though sometimes used for anything less than 20 reds, so long as the gross appearance is not bloody.)

So I guess mine was pseudo-champagne, since there were 3 red cells on microscopic… but just the fact that it was not grossly bloody (like the previous 3 I had tried) was entirely satisfying.