The first clue that something sensational was in the offing was the jam-packed Mercedes hospitality unit, with barely a space to stand. The second clue was the Netflix microphone, hovering conspicuously over an incensed George Russell, as he launched grenade after grenade.
And the third? Toto Wolff, entering stage left, two minutes into an extraordinary 14-minute media session for the written press on Thursday, at the season-concluding race of the F1 season in Abu Dhabi.