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“It felt like someone had taken a red-hot poker out of the fire and stuck it through my chest,” Grantham recalled.

The image on one side is a skewed view of nature — a field or garden full of red-hot poker plants, their spiky crimson and yellow flowers shown in human-size close-up, pressed against the picture plane.

One screen takes us through a field of red-hot poker flowers.

The pain is often described as a red-hot poker or ice pick stabbing behind the eye and on the temple.

"It was like having a red-hot poker, put between your vertebrae," she says.