Russians Vadim Makhorov and Vitaliy Raskalov are two guys with the biggest balls. They are back at what they do best, which is: climb really tall things and do really crazy things. This time, they hacked a billboard in Hong Kong, located on top of a skyscraper.

Here's the billboard:

As you can see, it's really very high up.

That's a really tall drop.

But it's no big deal.

Watch the stunt: