Longest Mexican wave line

According to Official Guinness Records,

The longest mexican wave line consisted of 8,453 participants and was organised by Realizar Impact Marketing at the Parque das Nações in Lisbon, Portugal, on 12 August 2007.

For a complete list of 2007 records, please visit 2007 Guinness Records in Portugal.

Other Portugal records that might interest you:

• Most widely supported football club
• Largest collection of whisky / whiskey bottles
• Longest loaf of bread
• Longest game of human table football
• Longest chain of watches