You’ve Never Heard Your Favorite Mix Artist This Way Before! [Watch]
There is a group of guys that go by the name "Bottle Boys" on YouTube and what they do is nothing short of incredible. They play songs using only glass bottles. You're probably thinking "anyone can blow into an empty bottle and make noise". That is true. But these guys play songs and you can totally recognize them! See for yourself!
I think the most impressive one I've watched is their cover of Billie Jean by Michael Jackson!