Abstract Most leadership models begin with the moment of decision. This article begins one moment earlier. Drawing on a frame-by-frame reconstruction of an artist and a violinist working under live performance constraints, it argues that the most consequential phase of leadership is the interval between signal and action, the brief, often invisible window in which perception, identity, and response have not yet aligned. Under conditions of accelerated signal flow, leaders are pressured to collapse this interval, producing decisions that appear sound but fail to hold. Building on Acceleration Without Metabolization (Morgan, 2026a) and the formation-versus-performance distinction developed in Art Is Leadership (Morgan, 2026b), the article reframes leadership as a holding practice rather than an executional one. It introduces four practitioner instruments (the Twenty-Minute Return, the Disconfirming Question, the Interpretation Window, and the Durability Test) designed to extend the interval at the threshold and to convert decisions from performances into formations. The wager is direct: organizations led by those who cannot hold the interval may move, act, and perform, but they will not transform. Keywords: Leadership formation; Threshold leadership; Acceleration without metabolization; Decision durability; Sensemaking under load; Organizational interpretive capacity; Practitioner-scholar leadership; Holding practice; Formation versus performance; Leadership under uncertainty; adaptive capacity; executive judgement