The McLaren driver was lucky to escape a penalty after he edged forward before the lights went out at Jeddah a fortnight ago.
While rivals, including George Russell, complained about him jumping the start as his car was seen to move, the FIA stewards ruled that there had been no offence as the car transponder had not triggered anything untoward.
Norris himself admitted to being “a little bit surprised” that he was not picked up for the incident, even though he gained no advantage.
Reflecting on what had caused the moment, Norris said that it was all triggered by him reacting to a nearby light – which may even have come from someone filming him.
“I've never done this ever in my life,” he said. “Since I did karting I've never done it, so I don't know what suddenly happened.
“You're so like just ready to go, but it's quite dark and there are so many lights. So I don't know if I've just reacted to a light elsewhere, either in the corner of my eye or somewhere in front, from people videoing or whatever it is.
“I reacted to something, but obviously quickly enough managed to stop. Then I've hurt myself in terms of the actual run down to Turn 1. I don't know if I can answer why it happened.”
Source: Autosport