Ever wonder how you would go in a race against 100m world record holder Usain Bolt?
Type in your estimated 100m time and see where you would finish in a one-off race with Bolt and his gold medal time at London.
Share with the friends and compare times.
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Which country tops the all-time medal table?
Which sport has the most medals on offer?
How far is that? A quirky look at world records
