Incredible hip flexibility

Check this out.

Anyone knows how this can be achieved or is it just genetics?

Friend,

This can be achieved by most people, though depending on genetics --- usually the ratio of the length of your torso to leg --- it may be easier or more difficult.

You'll also notice the leg didn't even stay behind his head.

jason

I would say that is definately achievable by most people.

Anyone knows how this can be achieved

Lots of stretching of the glutes, groin, thighs and hip flexors.