Super Saturday got off to a sensational start as Britain's rowers claimed two golds and Jessica Ennis continued her march towards Olympic glory.
Cheered by an ecstatic crowd, including silver medallist Zara Phillips and the Princess Royal, the men's coxless four of Andrew Triggs Hodge, Pete Reed, Tom James and Alex Gregory led from the front extending Britain's dominance in the Olympic event to 16 years.
And just minutes later Kat Copeland and Sophie Hosking hugged each other, almost in disbelief, as they claimed gold in the lightweight event.
The wins propelled the British team into third position in the medal table with 24 - ten gold, six silver and eight bronze.
The coxless four crew was also cheered on by Lieutenant Reed's fellow sailors and Royal Marines who are embarked on HMS Bulwark providing Games security in Weymouth.
Reed said: "The hours we do, the pain - it was all worth it in the end." A bewildered Copeland said: "I can't believe this is real - that we just won the Olympics."
Meanwhile, Ennis built on her impressive overnight lead in the heptathlon, delighting a capacity crowd in the Olympic Stadium with superb performance in the long jump.
A deafening roar went round the stadium as the heptathlete became one of just two competitors to take more than 1,000 points in the long jump.
The 26-year-old from Sheffield put in a 6.48m effort as many of the crowd were on their feet. With just the javelin and an 800m run to go, Ennis has racked up a 258-point lead as she bids to join Britain's golden girls on top of the podium.
And history was made in the Stadium as South Africa's Oscar Pistorius became the first double amputee to compete in the Olympics and Paralympics, advancing to the semi-final of the 400 metres.