A young woman who rushed to help a man seriously injured in a car crash said she was still in shock after the incident.
Daniella Tunmore, 23, from King's Lynn, was driving to London to spend a weekend in the capital when she saw a horrific accident on the A505 between Baldock and Royston in Hertfordshire.
A BMW convertible collided with the central reservation before flying through the air and crash landing on the carriageway.
MORE: Read how horror crash unfolded on busy dual carriageway
Driver Leigh Windsor, who is in his 30s and from Letchworth, Hertfordshire, was thrown clear from the vehicle and suffered serious head and leg injuries.
He remains in hospital, where his condition has been described as 'stable'. Another man in the car escaped with minor injuries. Miss Tunmore ran across the busy dual carriageway to where Mr Windsor was lying. She later said her brain 'just kicked in' and she feared the worst when she first saw Mr Windsor.
'He kept going in and out [of consciousness] and I thought he was going to go, but I just kept talking to him, telling him to stay awake and he kept coming back round,' she said. 'I told him not to move, and put pressure on his head to try to stop the blood coming out.
'I kept telling him everything was going to be OK, even though I really didn't know how it could be.
'His leg was in a right mess too. Another lady came who was a doctor, and she was putting a hoody on his leg to stop the bleeding.
'I've watched CSI so I know to put pressure on the wounds to stop the bleeding and I knew to keep him awake,' she said.
Miss Tunmore asked Mr Windsor about his two children and about himself as she waited for the ambulance to arrive.
Miss Tunmore, who needs crutches to get around after being diagnosed with a tumour in her leg, said she was not sure how she managed to get across the busy road to reach him.
'I usually find it difficult to get around,' she said. 'But in that moment I didn't notice. Something just happened and I knew I had to get there. I didn't have time to think shall I drive on, shall I stop to help. My body just flew into fight or flight mode.' Miss Tunmore added: 'I haven't been sleeping very well since I saw it, it was awful.'
Police are appealing for anyone who saw the crash, which happened at around 2.30pm on Saturday, to call 101.
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