A story from Archie Shepp:
“I asked John if he’d help me, it was about four in the morning,” Shepp recalls. “The next day, I was there at his home about 10 or 11 in the morning. When I got there, he was asleep. The story was that John would practice after the gig, even if he finished a gig at 4. I waited for him until about 1 o’clock when he got up.”
“His horn was lying on the sofa,” Shepp continues. “He got up and went right to his saxophone and began to play something that sounded like Giant Steps. He hadn’t recorded it yet, but he played it like he used to play it at the Five Spot. He played maybe 15 minutes of uninterrupted saxophone. He was a real virtuoso, John. When he finished, he asked me to play for him.”
Just wake up after playing all night, then immediately play what will become Giant Steps. Sure. Why don't we all just do this?