Oscar Pistorius finally won his first individual gold medal of London 2012 in the very last race at the Olympics Stadium.
The South African did not quite manage to live up to yesterday's claim that he would sign off in "spectacular" fashion, but he was still a hugely convincing winner in a new Paralympic record 46.68 seconds, more than three seconds ahead of the field.
After a shock 200m loss and an expected 100m one, the 400m was the one title the 25-year-old wanted to keep hold of more than any other.
It is his event, the one at which he made history by becoming the first amputee sprinter to compete in the Olympics.
And there was never any danger of an upset tonight.
Pistorius came into the race with a personal best more than five seconds quicker than the next fastest in the race, none of whom had broken the 50-second barrier. Pistorius can get close to 45secs at his best.
The South African is still the biggest draw in Paralympic sport and got a huge roar when introduced to the capacity crowd.
Alan Fonteles Oliveira, the T44 200m champion whose long blades sparked furious criticism from Pistorius in the immediate aftermath of that race, was in the lane outside him and for the first half of the race looked like he might pose a challenge.
But Pistorius came into the home straight with a clear lead and, as the Brazilian tired badly, American Blake Leeper came into second and compatriot David Prince third. Oliveira was fourth.
It marks the end of a long summer for the Blade Runner, who leaves London with two golds, having taken one in the relay, and a silver.