In the middle of the night it pounces out of nowhere, shocking me into resistant wakefulness. Reluctant to unwrap myself from my warm comfortable place, I try to gently stretch my toes with my opposite heel. It’s no use, I concede that I must walk about to return to normal. Barely opening my eyes I follow the shadows into what I know is open space in the living area and pace back and forth. I check the time on my way back to bed, 6.33am – too early to be up on a weekend.