From the sublime to the nauseous. Rory McIlroy could not produce the brilliance of his opening-round 63 here in the second round but he manfully fought off the effects of a stomach upset to retain the lead in the Desert Classic.
The Ulsterman heads into the final two rounds a shot clear of the American Brooks Koepka on 11 under after a 70. McIlroy trudged in looking pale but also determined and confident.
"I expect to win from here," he said. " I know the course as well as anyone else and I expect to go out there and shoot two good scores and lift the trophy."
But then, McIlroy "expected" to compile a commanding halfway advantage with which to stroll to his first European Tour win in 15 months, having finished runner-up in Abu Dhabi a fortnight ago. While Koepka's 65 is one obvious factor why his cushion is the bare minimum, then so too was the dodgy takeaway McIlroy had consumed.
The 24 year-old awoke feeling queasy and required repeated trips to the lavatory and, although he refused to seek excuses for his somewhat pedestrian round of two under, his body language plainly was not right.