The leading cause of death while taking selfies is drowning, followed by transportation (trains and cars), and then falling from high places.
What a fun article.
Here’s the Wikipedia webpage that maintains a list of selfie deaths.
Not just for the young.
A 68-year-old Belgian woman was visiting the El Tatio geyser field located within the Andes Mountains of northern Chile. While attempting to take a selfie in front of an active geyser she stepped backwards and fell into the scalding hot water. Her husband pulled her out, but she died in hospital days later from burns over 85 percent of her body.