So a couple years back I stumbled into a group dubbing itself "two cellos" that apparently became popularized after one of their renditions of a Michael Jackson song showed up on Glee.
Guys, they are two damn fine musicians, and consistently able to deliver the goods on rock and metal standards like "Thunderstruck", other AC/DC tracks (they cover a lot of them), Guns N Roses, "Voodoo People" by The Prodigy, and so on. Is it perfect? No - good rock music is often made to suit the instruments, the sound of the instrument evokes the mood.
But it's damned impressive, and not just in a "dog walks at all" sense.
The official live video for "Thunderstruck":
Oh, and a complete concert: