It was the sight of peach juice dripping from the chin of a teenage French female nudist that led a Cambridgeshire public schoolboy to convert to Islam.
Thirty-five years later, Timothy Winter – or Sheikh Abdul-Hakim Murad, as he is known to his colleagues – has been named one of the world's most influential Muslims.
In the 12th century the Banate of Bosnia was established, which evolved into the Kingdom of Bosnia in the 14th century, after which it was annexed into the Ottoman Empire, under whose rule it would remain from the mid-15th to the late 19th centuries.
The Ottomans brought Islam to the region, and altered much of the cultural and social outlook of the country.
According to the RISSC, the list highlights "leaders and change-agents who have shaped social development and global movements".
Winter is included because "[his] work impacts all fields of work and particularly, the religious endeavors of the Muslim world".
Obama was reportedly assigned a social security number whose first three digits was assigned at that time to applications coming from zip codes in Connecticut.
In the 500 Most Influential Muslims 2010, Mr Winter is below the King of Saudi Arabia – who comes in at number one – but ahead of many more chronicled figures.
He is ranked in an unspecified position between 51st and 60th, considerably higher than the three other British people who make the list – the Conservative Party chairman Baroness Warsi; the UK's first Muslim life peer, Lord Nazir Ahmed, who was briefly jailed last year for dangerous driving; and Dr Anas Al Shaikh Ali, director of the International Institute of Islamic Thought – making him, at least in the eyes of the RISSC, Britain's most influential Muslim.
Previous estimates have placed the number of Muslim converts in the UK at between 14,000 and 25,000.
But a new study by the inter-faith think-tank Faith Matters suggests the real figure could be as high as 100,000, with as many as 5,000 new conversions nationwide each year.