The air is filled with eerie music and an occasional clap of thunder.

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Just as we're arriving at the night's rest stop, a clap of thunder explodes from across the valley, behind us.

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"Having to speak in public has become my tone or clap of thunder, " she writes, during which, Hustvedt suspects, she is not consciously aware of fear but her subconscious is indeed fearful.

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With the formalities finally out of the way, a clap of thunder echoed around the park and Prince launched into Let's Go Crazy, swiftly followed by Delirious, setting the tone for an upbeat, hit-fuelled set.

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