Imagine you've just made a breakthrough. After years of promise tempered by your own errors and mental frailties, it clicks and you start fulfilling your potential. Then, suddenly, having reached your peak, the rug is yanked from under you.
That's exactly what has happened to Romain Grosjean over the past 18 months. After the nadir of last year's Monaco Grand Prix, where he was stunningly fast but repeatedly hit things, Grosjean's performances improved to the point where he was the star of the second half of the season.
His reward was to be lumbered with an uncompetitive car this season.