Curiously enough, the dolphins had long known of the impending destruction of the planet Earth and had made attempts to alert mankind to the danger; … - Douglas Adams

The room was not a room to elevate the soul. Louis XIV, to pick a name at random, would not have liked it, would have found it not sunny enough, and insufficiently full of mirrors. He would have desired someone to pick up the socks, put the records away, and maybe burn the place down. Michelangelo would have been distressed by its proportions, which were neither lofty nor shaped by any noticeable inner harmony or symmetry, other than that all parts of the room were pretty much equally full of old coffee mugs, shoes and brimming ashtrays, most of which were sharing their tasks with each other. The walls were painted in almost precisely that shade of green which Rafaello Sanzio would have bitten off his own right hand at the wrist rather than use, and Hercules, on seeing the room, would probably have returned half an hour later armed with a navigable river.

What is this? Some sort of galactic hyperhearse?

They were a double pair of Joo Janta 200 Super-Chromatic Peril Sensitive Sunglasses, which had been specifically designed to help people develop a relaxed attitude to danger. At the first hint of trouble they turn totally black and thus prevent you from seeing anything that might alarm you.