When you feel yourself say, "Ahhhhh! That was just right." it's because the performer did whatever it was according to the laws of physics. Trust me. I know.
Here we go, Day 37: https://ia600705.us.archive.org/31/items/Improv92011/9_20_119_49Pm.mp3
Where We Go When
Mary Prescott's piano improvisation blog Where We Go When, documenting her transition from classical to improvising pianist.