Social media users have been racing against radar speed indicators to see how fast they can run in a new viral challenge.
Videos from across the country show young men as they sprint past the LED signs in the hopes of being the quickest.
The indicators are installed on roadsides to show drivers how fast they are travelling. But people are now using the radars to race against their friends for the glory of registering the fastest speed.
The video credited with starting the craze, posted yesterday by Jack Earl, currently has more than 1.2million views on social media. It shows a student sprint past the radar four times, clocking speeds of 15, 16, 14, and finally 18mph.
Mr Earl has now challenged Olympic medalist Usain Bolt to a race after he posted the clip to his Twitter account.
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