Here's one I've been waiting to tell:
A tenor-playing friend says he overheard Dewey warming up on his tenor in Chicago. Instead of warming up with scales or patterns or runs, all Dewey did was about 10 minutes of going VERY slowly up a half-step (I think my friend said C-sharp to D), exploring the notes between the notes, exploring his ability to control fractional differences in pitch, and changing the tone color now and then.
He was just getting his tone built up, getting his command of the nuances in order -- and apparently trusting that everything else would fall into place after that.