When Bill hits the field and the whistle blows to start the game Belichick is in a race. He’s not just in a moment, he’s in a race to figure how [the opponent] wants to play the game. Once he figures it out, then he makes his adjustments.
https://www.patspropaganda.com/when-bill-hits-the-field-and-the-whistle-blows-to-2/