The most insane, extreme, over-the-top selfies ever taken

You will never top these extreme selfies. They're the extreme that extreme fears.

Do not attempt any of the things you are about to see. They were done either by high-caliber professionals of their field, or by straight-up crazy people.

Don't ever do this. Or the next one. Also, try not to get vertigo when you stare at it.

Authenticity: confirmed. It's real. This is Erik Biedron, who lives in Hong Kong and likes to climb the tallest structures he can find and post selfies at the very, very top. It's an actual thing called "rooftopping," and it's probably more popular in Russia than anywhere else. Biedron and his ilk do what they do without climbing or safety gear of any kind. It's all fun and games until someone plummets to their death.

Sanity: unconfirmed.

In his defense, it was the lion's idea.

Selfie game just got real.

And then it got served. I'll see your fighter squadron and raise you an active missile launch, punk.

Stupidity Level 20 achieved.

Dude is standing on the arm of Christ the Redeemer — that big statue in Rio. There's a metaphor here, but I can't put my finger on it.

This is Crown Prince Hamdan, the genuine heir to the throne of Dubai. He spends all of his time engaging in every kind of sports and extreme activity you can imagine, according to his Instagram account. Here he's pictured at the tippy top of the tallest building in the world, the Burj Khalifa, in Dubai. (The same building Tom Cruise climbed in Ghost Protocol.) Don't worry, he didn't actually climb the building's entire exterior. He rode the elevator to the top floor and then climbed the spire.

Meet Ferdinand Puentes. He was in a small plane that crashed in the Pacific Ocean, not far from Hawaii. Most of them survived, but the plane sunk into the water. While he was clinging to his flotation device, fearing for his life, and wondering when and if rescue might come, Puentes stopped and thought, "Wait, I haven't taken a selfie yet."

Just a guy scuba diving with a freaking great white shark right behind him.

Yeah, it's an astronaut in space, and there have been plenty of those. But this picture is much more extreme than you know.

You're looking at none other than Buzz Aldrin, the second man to ever set foot on the moon, and one of NASA and the space program's most vocal supporters. He also has the distinction of being the very first person ever to take a selfie — long before selfies were cool — in outer space. This photograph was taken during the Gemini 12 mission in 1966.

Respect.