This is the 1st of 3 phases and the beginning part of the step for Lead or Follow. In the Explosion Phase the muscles of the hip, the quad, and the glute all fire at once thereby creating a state of ‘energetic’ explosive energy. This state only happens for a moment or two, no more that. It’s just enough to move the leg and a little more. The energy only lasts the length of the step itself (duh), and slowly is allowed to dissipate as the Transfer phase begins.