Sir Simon Rattle called it 'the most taxing vocal piece I've ever encountered'

Only the five richest kings of Europe have ever been able to fund a vocal academy capable of producing 1 child out of 10,000 able to grow-up into a 'Pumba'...I leave you with Sir Simon again:

'I worry about the level of funding being squandered on the bassoon and ocarina when proper Pumba-level vocal training is being hopelessly neglected. But i think there IS hope' (less info)