“I should warn you that the chamber we are about to pass into does not literally exist within our planet. It is a little too … large. We are about to pass through a gateway into a vast tract of hyperspace. It may disturb you.”

Arthur made nervous noises.

Slartibartfast touched a button and added, not entirely reassuringly. “It certainly scares the willies out of me. Hold tight.”

The car shot forward straight into the circle of light, and suddenly Arthur had a fairly clear idea of what infinity looked like.