Have a good look at the photo. The pretty rhododendron to the left of the chair looks a bit odd. That’s because it’s a ghost shrub. No, our garden isn’t haunted, and neither have I doctored the photo; it’s an example of Pepper’s Ghost – an illusion caused by reflections. The bush in question is off to the right, out of frame, and the camera is seeing its reflection in the window. Because the bush is well lit, but the background isn’t, it appears to be ‘real’. The effect looked even more stunning with polarizing sunglasses on.