Six strokes were made and rejected before the seventh, which is where the name comes from. The client had asked for something that could not be repeated, so the process mattered more than the reference — each attempt was made in one pass with no correction allowed. Translating it to skin required deciding how much of the brush's fraying to keep, since a perfectly clean edge would have erased the evidence of speed. Running it down the spine meant the stroke could stay long enough to still read as a single movement.