A friend was lying flat on a hospital gurney with her head tilted up to look at her stomach on which a clear structure was sitting. If you remember the doozers, the tiny construction workers from Fraggle Rock, the structure was identical to their thin, clear stick-like, frames.
Then, suddenly, I was the one on the gurney, but without the structure. A clear large cylinder was being slowly inserted into my stomach. It did not hurt at all. Once the tube was in place, the translucent dozer structure began to slowly build inside the tube. When it was complete, the small, straight, clear pieces of the buildng began to fill with my blood like tiny veins.