New world record - domino toppling

Above is a 4-minute excerpt of a two-hour-long event in which 4.3 million dominos fell.

According to the organisers the 2008 attempt required 9,500 sq m (31,168 sq ft) of space, more 250 different types of domino, 300 mechanics, 100 decor pieces, 1500 turning fences and more than 5,000 square m (16,404 sq ft) of floor paint.

More than 85 people from 13 countries took part in the challenge, which took eight weeks to set up and was a year in the planning.

Acrobat and former Miss Finland, Salima Peippo, toppled the first domino while suspended from the ceiling by ropes.

The video embedded above has somewhat annoying music; it's better in the one at the BBC link, but I couldn't embed that one. There are several hundred more videos stored at YouTube, not only of the events but of the preparations and technology involved.