'That's unbelievable!' - four years of training, to fall at the start line

Watch Poland's Artur Nogal slip having just left the start line in the men's 500m speed-skating event in Pyeongchang.

WATCH MORE: 'Comeback kids' - GB's Coomes & Buckland qualify for free skate

Watch the 2018 Winter Olympics live on BBC TV, Red Button, Connected TVs, BBC Sport website and mobile app.

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