Few expected her snowboarding success to translate to the dramatically different sport of Alpine skiing, where Ledecka entered the super-G ranked 43rd in the World Cup standings.
"She's one of the best athletes in the world", snowboard coach Justin Reiter said.
"I was just staring at the board and nothing was happening and everybody was screaming". If she goes on to win snowboard parallel giant slalom gold on Saturday 24 February, her status as an Olympic legend will be guaranteed.
Vonn will have another chance to become the oldest female medallist in Olympic alpine skiing in her favoured downhill on the same mountain next week.
Then Ledecka, drawn 26th, began her run - unspectacular at first but gathering pace and drawing a roaring crescendo from the crowd as she ripped up the lower half of the course to usurp the shell-shocked Veith.
Now Ledecka turns her focus from two planks to one, with the women's parallel giant slalom starting on February 24.
At the outset, I said to myself: "You're there, without pressure, in contrast to your opponents".More news: Kansas Comeback Tops WVU Yet Again
She didn't realize what had happened.
"It's definitely shocking. I wish I had as much athleticism as she has that I could just hop from sport to sport and just, like, win everything".
"We were all at the top watching and we all went silent", veteran ski racer Sarah Schleper of Mexico, running 39th, told Reuters after the race. I really don't know what happened.
Vonn had a fast run going before going too wide on a turn near the bottom.
The field for the women's Super-G also included American Lindsey Vonn (No. 10 in the world overall), who sped out of the gate and topped 100 kph in the first portion of the course - but lost her way in the middle and lower portion, losing time as she redirected herself.
Vonn - absent from Sochi 2014 due to injury - was left to rue a late error on her own run, which ended her hopes of claiming a medal. I didn't really have a choice in the matter so I did the best that I could. Her mother Zuzana was a successful figure skater at national level, while her grandfather, Jan Kaplac, was a member of the great Czechoslovakian ice hockey team that won world championship gold in 1972 and Olympic bronze at Innsbruck 1964 and silver at Grenoble 1968.
Take a look at her reaction - it's hardly the face of someone who believes they just won gold.