Man solves Rubik's Cube while juggling
A video of mathematics undergraduate solving a Rubik's Cube while juggling it with two balls has gone viral online.
The amazing clip of the man, known as 'Sir Ravi' on YouTube, has been viewed more than three million times.
In the film, the Stanford University student manages to complete the puzzle in just a minute-and-a-half.
The Rubik's Cube was invented in 1974 by Hungarian sculptor and professor of architecture Erno Rubik.
It is the world's top-selling puzzle game with 350 million cubes sold by January 2009.