The unnamed woman was dangling out of the vehicle on the M25 motorway south of London, the Surrey police wrote on Twitter.
“It’s just luck that she wasn’t seriously injured or killed,” they said.
They posted a photo of the open passenger window, next to the hashtag #nowords.
Asked by a user if the officers explained the dangers of the attempt to the woman, the police replied: “They solved every possibility before we talked!”
The researchers found that most of the selfie deaths occurred in India, followed by Russia, the United States and Pakistan. Most of the victims were men (about 72%) and under the age of 30.