During a celebration to mark his friend's month-old third child in July, Mr Zeng Liwei spotted an amusing sight.
The family's first son, Matthias Ng, was watching a children's programme on television while scratching an itch with his legs up in the air, oblivious to his grandfather and second brother next to him.
"I thought this was quite interesting because adults can't do this," said the 30-year-old, who immediately photographed the three-year-old child.
The professional photographer sent in the picture for last week's Big Picture contest theme "Shiok!", which asked for photos of various aspects of life in Singapore that personified the term.
While the three contest judges picked different photos to win, Mr Zeng's received the most votes based on each of their top three shortlists. Mr Zeng won the $500 prize for this year-long contest organised by The New Paper and the Ministry of Culture, Community and Youth to encourage Singaporeans to document everyday life in the city.
The photo deserved to win because it captured an "intimate and candid moment", said judge Neo Xiaobin.
She added: "I like that it's relatable, not obvious, and well-composed with lines from the limbs, furniture and reflection, which make for interesting graphic shapes visually."
Also impressed was judge Caleb Ming, who said: "I know how this feels. This is a perfectly innocent moment. He even has a chair of his own, not an adult-size one but one that is made just for him. Truly a boss in the making."
However, it was only his runner-up, and his winner was Mr Koh Meng Hua's photo of a man enjoying himself in an icebox after a race.
Judge Hedy Khoo, however, declined to pick a winner as she felt none of last week's photographs deserved to win.
"Shiok is that intense feeling of exquisite satisfaction and happiness, which none of these entries conveyed," she explained.
Mr Zeng said the prize money will go towards this year's Christmas presents for Matthias and his brothers, Aaron and Daniel.
They are the children of his good friend, whom he has known since a child as they attended the same church.
Get The New Paper for more stories.