Most non-magicians taught to present a trick in a single location

According to Official Guinness Records,

Magician Luis de Matos (Portugal) taught 52,000 people a simple method to apparently vanish 52,001 silk handkerchiefs simultaneously at the Estádio do Dragão football stadium, Porto, Portugal. The effect (not the lesson) was shown live on RTP television on 16 November 2003.
The illusion was part of the stadium's opening ceremony, inaugurated with a friendly between FC Porto and FC Barcelona.

For a complete list of 2003 records, please visit 2003 Guinness Records in Portugal.

Related Images

Other Portugal records that might interest you:

• Largest patchwork quilt
• Largest human logo / image
• First balloon flight
• Longest reign in Europe
• Highest mountain face underwater
• Highest box-office film gross for a Portuguese film
• Fastest hovercraft