The longest line of M&M’s pretzel candies lined up in 30 seconds is 30, achieved by Alastair Galpin (New Zealand), in Auckland, New Zealand, on 20 March 2012. This record was broken on the Guinness World Record Challengers site (Challengers’ tag: AlastairGalpin): http://challengers.guinnessworldrecords.com/challenges/38-longest-line-of-mms-pretzel-candies-lined-up-in-30-seconds/attempts/1511
The longest line of ice skaters was achieved by 252 participants in Votkinsk, Russia, on 9 March 2008.
The world’s longest line of horses involved 105 horses linked by harnesses in single file and was achieved by Jose Antonio Martínez (Spain) and Amics del Cavall de Benicarló on 18 January 2004 in Benicarló, Valence, Spain.
The longest line of handprints consisted of 119,537 handprints and measured 35,502.5 m (116,478 ft) in Flieden, Germany on 6 October 2005. The event was organized by vivesco Apotheken-Partner GmbH.
The longest line of hamburgers is 306.27 m (1,004 ft 10 in) and was achieved by The Kuwait Food Co. Americana (Kuwait), in Kuwait city, Kuwait, on 30 May 2009. 2,500 hamburgers from Hardees restaurant were used to make the line. The ingredients were: buns, beef burger, cheese, ketchup. The line was assembled in the form of the Kuwait towers.
The longest line of footprints consisted of 15,200 footprints and measured 4,484 m (14,711 ft) at an event arranged by WA Newspapers in Perth, Western Australia on 10 December 2005.
The longest line of floating air-beds consisted of 2088 people on air beds who formed a continuous line for over 30 seconds in an event organized by Havaianas and Aqeuo (both Australia) in Cottesloe, Australia on 26 January 2012. The record was set to celebrate Australia Day. Havaianas and Aqeuo also were the previous record holders.
On 19 October 2002 an unbroken line of firecrackers was detonated in Sueca, Valencia, Spain, measuring 11 km (6.83 miles) long. The unbroken line of 11 km (6.83 miles) was part of a larger attempt of 21 km (13.04 miles), but the line stopped at the 4 km (2.48 miles), 5 km (3.10 miles) and 10 km (6.21 miles) marks.
The Stanford Linear Accelerator Center (SLAC) in California, USA, is a particle accelerator some 3.2 km (2 miles) long. Since beginning operations in 1966, its key achievements include the discovery of the charm quark and tau lepton subatomic particles. The accelerator is located underground and is, according to administrators, among the world’s longest, straightest objects.
The longest line of toy cars consists of 24,189 vehicles and was created by the National Motor Museum, Beaulieu (UK) in Beaulieu, UK, on 05 May 2014. The line measured approximately 2 kilometres.