Kung Fu Master Hits the Nail on the Headstand

10/27/2010 6:30 PM PDT BY TMZ STAFF
Don't try this at home -- unless you're a thick-skinned Kung Fu expert with incredible balance and a high threshold for pain.

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Professional badass Li Xin recently showed the world his incredibly awesome and equally ridiculous ability to balance his entire body weight on top of nail ... using only his tender dome skin as a point of contact.

Ain't that a prick in the head?