New Zealand's Stuart Farquhar was delighted after qualifying for the Olympic javelin final with his first throw.
Farquhar threw 82.32m in qualifying, the first person to throw beyond the automatic qualifying mark of 82m.
He was one of only three throwers to better the mark in his group.
The Hamilton 30-year-old said it was a huge relief to qualify, and good to have got there in one throw.
"You don't want to do two because you fatigue yourself too much and you start playing the mind games more. Getting it over and done with in one round makes it much easier," he said.
"I felt really confident. The last four or five throwing sessions have been really relaxed and really good and I'm carrying on that momentum and it just came out in the first round."
Farquhar, the Delhi Commonwealth Games silver medallist, has not always realised his potential in major world events, with his 2011 World Championship 11th his only final at the top level.
But he came into the competition on career-best form, with his personal best of 86.31m set in Hiroshima in April being the third best throw of the year.
"I've had a lot of ups and downs since I threw 86 earlier on in the season, but I'm coming right now."
The final will be held on Saturday.