Jamaica's Asafa Powell equalled his own 100 metres world record of 9.77 seconds and then told rival Justin Gatlin: "That's how you run a world record."
Powell, who shares the 100m record with American Gatlin, was competing at the British Grand Prix in which Gatlin was meant to run but withdrew.
When asked if he had a message to his rival, 23-year-old Powell said: "That's how you run a world record. As I said, I can run as fast as I want, when I want. I told them I would do my best here and I didn't let them down.
"My coach is not all that happy because in the end I didn't do what he wanted me to do, but I can work on that. I came out and proved I can run 9.77secs again."
Powell earned a £27,000 bonus with his phenomenal performance, streaking to victory to match the mark he achieved last June in Athens.
Earlier in the week, Powell said he would break Dwain Chambers' stadium record of 10.05secs, set seven years ago. He did just that in the final, after sauntering through his heat earlier in the afternoon.
Powell then unleashed himself to full speed for the first time this year, to delight the 8,500 crowd.
Behind him, there was also a fantastic display from Chambers, making his competitive comeback after serving a two-year drugs suspension.
Chambers was banned for using the designer drug THG but he has always been adamant he could regain his status as a world-class sprinter.
The 28-year-old Londoner showed that is on the cards when clinching third place, just behind last summer's world championship silver medallist Michael Frater in a time of 10.07secs.
"I didn't expect that at all - not at all," said Chambers, who defeated his major British rivals - Coventry's Marlon Devonish and Birchfield Harrier Mark Lewis-Francis - who were fourth and fifth, with teenager Harry AikinesAryeetey finishing last in eighth place.
Chambers added: "I was pleased with the reception I got from the crowd."
The spectators clapped him loudly before the final got under way.
"The past has now gone and I can now look to the future," added Chambers. The British record-holder said: "Despite all the ups and downs, I showed I can still compete.
"I didn't think I'd have another day like this. It's good to do it in front of a British crowd," admitted Chambers, who has prepared for his comeback in Jamaica for the last seven months.
Chambers' performance was good enough to impress UK Athletics performance director Dave Collins, who said: "The European Cup place is there for Chambers if he wants it."
Powell was insistent there was even more to come and played down the non-appearance of his US rival and fellow record-holder Justin Gatlin in what would would have been their first head-to-head of the season at the UK venue.
"That's his problem, not mine - if I get the right conditions, I can go 9.7," said Powell, who actually ran 9.7629secs - the quickest 100m ever achieved - but the time was rounded up for record purposes.
Powell, who has even suggested a 9.6secs time is a possibility, added: "I'm not disappointed at not breaking the world record - it's still early in the season."
The Caribbean ace, who bettered Chambers' seven-year stadium record of 10.05secs, said: "I made it look easy but that's how I run".
Becky Lyne broke two minutes for 800m although she was beaten, for the second time in nine days, by Janeth Jepkosgei. The Kenyan's victory was much more empathic than in Oslo, when lowering her national record and world-leading time for the year to 1:57.
Lyne fought bravely to combat the front-running style of her African opponent but did not have the finishing pace to catch her in the final sprint.
Nevertheless, it was an outstanding performance by the former European Under-23 champion, whose time of 1:58.20 made her the UK's third-fastest two-lap runner behind Kelly Holmes and Kirsty Wade.
Natasha Danvers-Smith, like Chambers and Lyne, will almost certainly have guaranteed her place in the Great Britain European Cup side for Malaga late this month, after setting a season's-best to win the 400m hurdles. Consistent Danvers-Smith had a time of 54.85secs. ..SUPL: