A universe within

Once the tube was down his throat, Frank tried not to look at the screen. He knew it would make him faint or retch or both. But curiosity overcame him: how many chances do you get to see inside yourself? He tilted his eyes down until the picture came into view. But the light on the endoscope must have failed: he saw nothing but darkness. So why were they still going? Then there was a light: a star – no, a galaxy. As the tube pushed further he saw more, great spirals and distant fires, uncountable worlds, a universe within. A voice said we're taking it out now, well done, and Frank wanted to clamp his teeth down so he could keep watching.