Then a strange thing happened.

For no apparent reason she felt a sense of dread begin to invade her. Her brain was on red alert, saying that something was badly wrong. She knew nothing about bikes, but much about troubled minds, and every instinct told her that this man was labouring under a burden and fast reaching his limit.

She stood up, pressing against the rail, frowning as her brain tried to understand what her instincts could sense. He was right ahead again. Coming straight for her until he swung into the bend.

But it was as though he leaned in too deep and couldn’t get out. The next moment the front wheel twisted, jerking the machine into a scissor-like movement that sent him flying through the air.

All around there were shouts of horror, but Polly was galvanised into action. She was first over the barrier, racing across the track, dodging the lethally spinning wheels of the bike, lying on its side, and throwing herself down by Ruggiero.

‘Don’t move,’ she said, unsure whether he could hear her.

‘Hey-’ Piero Fantone had caught up and tried to pull her away.

‘I’m a nurse,’ she said, struggling free. ‘Get an ambulance.’

‘Ambulanza!’ Piero bawled, and turned back to her.

Ruggiero gasped and made a movement. Through the dark plastic of the visor Polly saw him open his eyes, saw the stunned look in them before they closed again.

‘Did he break anything?’ Piero demanded.

She ran her hands lightly over Ruggiero.

‘I don’t think so. But I’ll know better when some of this leather is removed. We need to get him inside.’

‘We keep a stretcher here. It’s on its way.’

From behind the visor a voice growled words she didn’t understand, but the gist of them was clear to Piero, from his urgent voice and attempts to restrain him. His reward was a stream of Neapolitan words that Polly rightly guessed to be curses.

‘He’s all right,’ Piero said.

‘It’s certainly reassuring,’ she agreed.