Rob Scallon's quirky entertainment knows no bounds as the YouTube star never fails to impress. He's been celebrating 'May-Tallica' all month with video tributes to the thrash legends. This week's video might be the best one yet as three people play Metallica's "One" on one guitar!

The eight string axe is Scallon's own signature model from Chapman, highlighted against a black background. All that is visible are the hands of each guitar player, assuming the roles of lead guitar, rhythm guitar and bass. Everyone has seen the stage move where guitarists will reach over and play each other's guitars or team up to play one guitar together, but this video takes the antics to another level.

A fifth hand enters the fold taking on the bass role, simply using one finger to play the root notes on the top string. Amazingly, there is enough room for all three parts of the ...And Justice for All track to be played without compromise and things get even more interesting at the mid-section where all the parts pick up in complexity and the hands take turns at playing certain moments. The highlight of the video comes toward the end where the tapping solo begins and the rhythm's intensity is at an apex.

Scallon's other 'May-Tallica' tribute videos have also included a banjo cover of "Master of Puppets" along with a wild keytar solo, a ukulele cover of "Blackened" and a riff medley running through every Metallica song in chronological order, clocking in at a hair under four minutes!

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