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A little camera trickery is helping Mumford & Sons look like much more than a quartet in the new video for their latest single, "Babel."  The British folk-rockers debuted the clip on Monday. 

It's made up of what looks like one continuous panning shot of the group performing inside a huge, run-down room in San Francisco.  But as the camera continues to spin, the band members start multiplying and even picking up different instruments. 

"Babel" is the fourth single and the title track from Mumford and Sons' Grammy-winning sophomore album.  The record just returned to the number one spot on the U.K. album charts following their headlining set at Glastonbury.