Staffordshire swimmer Adam Peaty has won another gold medal at the Swimming World Championships in Budapest.
But even the 22-year-old Uttoexter swimmer did not expect what happened - a 0.47 seconds improvement on the world record of 26.42 seconds he set in winning the 50m title in Kazan, Russia in 2015.
Peaty's time of 25.99 was enough to take the title, with Brazil's Joao Gomes Junior second in 26.52, and South African Cameron Van Der Burgh claiming bronze with a time of 26.60. Together with Georgia Davies on the breaststroke, James Guy on butterfly and Siobhan O'Connor on freestyle as Britain finished fifth in 3mins 41.56secs. It was almost a second slower than her world-record performance at the Rio Olympics last summer but enough to hold off hard-charging Yui Ohashi of Japan, who settled for silver in 2:07.91. She breezed through the gruelling event in 15:47.57 - almost 18 seconds faster than second-fastest qualifier Mireia Belmonte of Spain.
Duncan Scott had success in the Men's 100m Freestyle semi-final, finishing second.
"We'll see what tactical changes we've got to make", said Peaty.
Peaty will compete in the 4x100m men's medley relay this weekend.
Instead, he appeared nonplussed and said after the morning heats: "Honestly, I wasn't going out there this morning for a world record".
And BBC pundit Rebecca Adlington, a two-time Olympic champion in the pool, reckons knowing he had another important swim to come may have stopped him breaking his world record again.
"The tactic tonight was a case of doing the same thing as this morning and I pretty much did that".
"Unlike in Rio, it was a very different objective for me". It was just me easing through the stroke and touching the wall.
In a race where Gemma Spofforth's world record fell after eight years - Canadian Kylie Masse taking two hundredths off her time - Dawson could only manage eighth in a time 59.90. Kathleen Dawson was 19th in 28.42, missing out on a place in the semi-finals.
Over the shorter distance, Peaty roared out of the blocks in Tuesday morning's heats to clock 26.10sec and smash his own world record.