It was a day of starkly contrasting fortunes for the two figureheads of the U.S. ski team. The 23-year-old Shiffrin had just put down what turned out to be the winning run, edging out Italian Sofia Goggia by 0.02 seconds, and was watching the screens in the finish area as speed queen Vonn started.
Former Olympic champion Vonn, winner of 82 World Cup races, began well but lost her line as she approached a small jump and hit a marker gate, before careering across the slope at high speed and into the safety netting. Shiffrin could hardly bring herself to watch as Vonn was attended to by course officials and medics, but thankfully the 34-year-old got back on her skis and made her way to the bottom.
She waved to the crowd and received warm applause. A technical layout had caused problems for many of the racers, but Shiffrin, who already has 56 World Cup wins including 13 this season, got the balance between speed and line just right as she powered to gold.
Only 0.54 seconds separated the top 10 finishers. "This is crazy," she said. "It was a really tight race, the differences were like nothing. It was a fight. It's tough, all these girls deserved to win."
Two-time world champion Vonn, who has struggled with knee injuries throughout her career, has said she is retiring after the championships in the Swedish resort. She could still end her career in fairytale fashion, however, with the downhill still to come, provided she suffered no damage during her spill on Tuesday.
"We knew this was going to be a challenge for her, but she was pushing hard," Bode Miller, the most successful male American skier and now analysing the championships for Eurosport, said. "I was a little concerned. She didn't make much of an error. Happy to see her get up and stand up because those are the kind of accidents that eat you up.
"She has another race coming up but it's whether she is still willing to take that risk." Despite the Super-G course being slightly shortened, it still proved a formidable piste with several skiers going off. Another American, Laurenne Ross, also crashed heavily as the cloud cover came down to create tricky light conditions.
Czech Ester Ledecka, surprise gold-medallist in Super-G at last year's Winter Olympics, finished outside the top 20. (Reporting by Martyn Herman, editing by Pritha Sarkar)