London rapper Wretch 32 has put his hearing to the test in a unique experiment as part of a new Network Rail safety campaign aimed at young men.
The video shows Wretch 32 and spoken word performer George the Poet battle to make a split second decision, relying only on their hearing to work out which direction a train is coming from as it travels towards them at 80mph in the dark.
Find out what happened here.
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The eagle-eyed resident spotted the mistake on signs just feet apart in south London.
The victim was attacked after bumping into a man at the ticket barrier at Putney Station.
The victim, who is his 40s, was found near the edge of palace grounds.