Dina Asher-Smith could scarcely comprehend her achievement after becoming the first British woman to break the 11-second barrier for the 100 metres.
The 19-year-old history student announced her arrival as a world-class force by clocking 10.99 seconds at the Sainsbury's Anniversary Games.
The Londoner was a box carrier at London 2012, but her achievement on her return to the Olympic Stadium, while only ranking her 17th in the world this year, marked a watershed moment in British women's sprinting.
It was in the heat where she lowered her own British record by 0.03secs, before having to settle for fourth place in the final in 11.06s, still a time only one other British athlete has bettered.
Asher-Smith, who in the last two months has run three of the four fastest times ever by a British woman, said: "I'm in the 10 seconds now so I'm absolutely over the moon.
"I felt like I was in good shape, but feeling in good shape and then doing it are two very different things.
"When I crossed the line and saw the time I was beaming. I'm really, really happy. I was like, 'What on earth have I just run'?
"I've still got work to do. In both races there is stuff to work on so hopefully I can go a bit faster."
Holland's Dafne Schippers won the final in a Dutch record 10.92.
Asher-Smith is not certain to run the 100m at the World Championships in Beijing in a month's time.
The 200m is also an option and she has ruled out doubling up.
"The selectors (decide)," she said. "It's their team so they make the selection."
Asher-Smith's British record was followed moments later by another, this time for Shara Proctor in the long jump, as the Anguilla-born athlete soared out to 6.98m with the last attempt of the competition.
Proctor, who improved her national record by 3cm to take victory, said: "I didn't see this coming.
"I pulled out a 6.98m today so definitely seven metres is right there. A few little technical tweaks and it'll be right there.
"This stadium is very special. I remember being here for the Olympics and I didn't get the result I wanted, but today I came back and redeemed myself."
