He told police he was then made to stand up before being pushed backward but then the boy rushed off to his room, where, according to his older brother, he was crying but wouldn't say what was wrong.
The accused, represented by Palmerston North barrister Peter Coles, said yesterday he became alarmed when he could see through the lounge window that the boy had not responded after the officer called out, and tapped on the window.
The boy appeared motionless and he thought there was something wrong with him, the accused said.
The officer said he had always had a good relationship with his nephew, his brother's son, and had had no issues with the boy in the past.
He denied to Crown prosecutor Rebecca Guthrie he had asked the boy if he was "deaf".
He said: "It was not the right thing to say to someone you're trying to save."
In evidence expected to continue today, the accused's brother said he came home later in the day, by which time the accused had gone home.
His son seemed "happy" until the boy's brother prodded him and asked their father if he'd heard about the boy's "rage-quit", a term the family had coined for bailing out of computer games because of a poor result.
The family also used a term "hedgehog" for when the boy put on his "thousand yards" stare.
The boy dropped to the ground and hid beneath a table as his brother spoke.
After a phone call, he was collected by his mother soon afterwards.
The case continues.