"Do you have enough energy to smash into an atom, or do you want to go around the accelerator again to get more?" Experimenters ask each electron this question when it reaches this spot. If an electron is ready for the experiments, it goes down the tunnel on the left towards the experimental halls. If it needs more energy, it is bent to the right and goes around the accelerator again.
Crawl under the beam pipe and turn around if you would like a different view.