At one point the 34-year-old looked set to break the world record, but narrowly missed out by 21 seconds.
An attempt to break the world record for the most sandcastles built in an hour is being made on a Dorset beach.
The twins had thought the vegetable was likely to be bigger than it actually turned out to be and had hoped to break the world record.
An attempt on Bournemouth beach to break the world record for the most sandcastles built in an hour has failed by being just five structures short.
Ye Shiwen took seconds off her personal best to break the world record and win a gold medal in the 400m medley on Saturday, swimming faster in the last 50m than the winner of the men's event.
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"This was my first real attempt to break the world record, I knew I was good, I had trained hard, " added Rudisha, whose father Daniel won silver for Kenya in the 4x400m at the 1968 Mexico Olympics.
The TV researcher asked the owner if he was planning to break to the world record for the biggest bowl of hummus.
Bollywood dancers and music filled Victoria Embankment gardens in London on Saturday afternoon as people gathered in an attempt to break the Guinness World Record for the most people dancing a Bollywood routine.
He convinced Nigel Mangan, an Irishman preparing to break the Guinness World Record for most consecutive golf balls hit in 12 hours, to use a Hirzl glove on each hand instead of the Bionic gloves he was training with before.
To break the current Guinness World Record, more than 331 people, dressed in suitable attire, need to gather en masse for a minimum of 10 minutes.
Bring your appetite: you can also take part in the festival's effort to break the record for world's largest brunch, and participate in shows by Guerilla Science and Dave Carmel and his Neurological Wonders.
Moira Hornik, spokeswoman for the charity, said they were hoping for a good turnout to break the current Guinness World Record.
Rudisha ran one minute 40.91 seconds to break his own world record, the first in the track and field events at the Games.
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Every winter they hold SuperZampone, a festival where local sausage makers try to break their own world record for the largest zampone ever.
Mactier beat Dutch defending Olympic champion Leontien Zijlaard-van Moorsel in a time of three minutes 29.945 seconds to break the record Ulmer had set at the world championships in May.
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