Bethany Shriever struck gold and Kye Whyte silver as Britain's BMX stars dominated in Tokyo to win Team GB's first Olympic medals in the sport.
Shriever went unbeaten through her three semi runs and surged out the start gate to open up a lead on her rivals.
But round the final corner, Colombia's Marian Pajon came charging, the 22-year old from Essex - a former world junior champion - crossing the line just 0.090 seconds ahead.
Whyte also got a flying start in his race and was always in the medal places, as Holland's Niek Kimmann took gold.
“Honestly, I’m in shock. To even be here is an achievement in itself. To make a final is another achievement – to come away with a medal, let alone a gold medal, I’m so over the moon," said Shriever.
“I owe a lot of it to everyone. It just means so much, I’m so grateful for the support, for everyone waking up at home, I’m overwhelmed.
“Results are out of our control so gold isn’t a set goal. It was about keeping to my routine around the track, I managed to hold on and take the win. It’s crazy, actually crazy.
“I was watching Kye and I was almost crying when he got a silver. I had to keep my cool, reset and dig in. I had no legs, I gave it everything I got.
“I had nothing left, the lactic acid. I gave it actually everything I had, and I was rewarded.”