That young man is Joshua Bell, one of the foremost musicians of the day. The place is the metro in Washington DC.
It was a social experiment set up by the Washington Post to see what would happen. How ordinary passers by would react to the kind of music people pay top dollar to hear in concert halls.
The people scurry by in comical little hops and starts, cups of coffee in their hands, cellphones at their ears, ID tags slapping at their bellies, a grim danse macabre to indifference, inertia and the dingy, gray rush of modernity.
H/T to Carriere.