Minus the "rather". This is a miniaturized version of the Karlheinz Stockhausen's Helicopter String Quartet.
A friend of mine, whose tastes tended towards the eccentric, went out of his way to get a copy of the Adritti Quartet recording. This version, adapted by Virgil Moorefield, is quite spectacular, especially as a video.
Enjoy! (thanks to Sequenza21 for pointing it out)