Lee Scratch Perry arrived on stage sporting a blue beard and eccentric garb which appeared to be a form of badge-encrusted armour.

It didn't take long for the audience to work out he was totally bonkers.

For more than an hour the excited, sold-out crowd boogied to the rhythmic beats of the fantastic Mad Professor's mixes.

Perry's most significant role has undoubtedly been that of a producer.

He was instrumental in moving Jamaican music beyond the frenetic simplicity of the ska beat toward the bass-heavy, slow throb of the roots "riddim", thereby laying the foundations for contemporary reggae.

Yet Perry's long-lasting appeal seems to be just as much about his insanity as his genius.

Somehow, watching him fluctuate between moments of brilliance and grimace-inducing wails, I could see why.

Despite him being a touch unsettling, no one doubted they were in the presence of a legend.