In a Formula One season dominated by Mercedes, Sunday's Abu Dhabi Grand Prix was an anomaly.
In a straight fight and on a track where Mercedes has won every grand prix since 2014, Red Bull not only took pole position but also a convincing victory.
It was only the team's second race win this year, which may not seem like a reason to get excited, but its timing and the manner in which it was delivered could hint at a more competitive season next year.
For too long F1 has seen one team dominate -- be it Red Bull between 2010 and 2013 or Mercedes from 2014 onwards -- and the prospect of a genuine title fight is tantilising
But those who have watched Mercedes' domination of the past seven years will also recall numerous false dawns for rival teams.