How Is This Raw Chicken Egg Standing Whole Without Its Shell?

What kind of sorcery is this? How is this egg standing whole without its shell? Apparently, the inner membrane -- the thin layer that you can see stuck to the hard shell when you boil an egg -- is strong enough to hold it without breaking its shape. But how can you do this?

According to author Biswarup Ganguly -- an Indian photographer who works at the National Council of Science Museums -- "the white eggshell has been removed by dipping a normal chicken egg into vinegar for 48 hours."

I have to try this right now.

Picture: Biswarup GangulyWikimedia