Snapping the perfect selfie can be fun. But if it involves flying a plane or holding a loaded handgun or standing on slippery rocks near the top of a waterfall, you may want to think twice.

Some 259 people worldwide have died while taking selfies, according to a study published in the Journal of Family Medicine and Primary Care. Researchers from the All India Institute of Medical Sciences, a group of public medical colleges in New Delhi, scoured news reports on selfie deaths that occurred from October 2011 to November 2017.

They found that the most selfie deaths occurred in India, followed by Russia, the US and Pakistan. Most of the victims were men (about 72%) and under the age of 30.

India accounted for more than half the total -- 159 reported selfie deaths since 2011. Researchers attributed the high number to the country's enormous population of people under 30, which is the world's largest.

Although women generally take more selfies than men, researchers found that men were more likely to take risks -- like standing at the edge of a cliff -- to capture a dramatic shot. "It justifies the higher number of deaths and incidents for men," the study said.

Drownings and fallings

Drowning is the leading cause of selfie deaths, usually involving people being washed away by waves on beaches or falling out of a boat.

The second-leading cause is listed as "transport" -- people killed, for example, while trying to snap a quick pic in front of a moving train.

Tied for third are selfie deaths involving fires and falls from high places. Eight people died while taking selfies with dangerous animals.

Unsurprisingly, the US led in the number of selfie deaths involving a firearm -- people accidentally shooting themselves while posing with guns.

Selfie deaths are on the rise, too. There were just three reported selfie deaths in 2011. By 2016 that number had shot up to 98.(CNN)

•The teen who plunged 30ft to her death after trying to take a selfie on top of a railway bridge