...and the Universe, ... will explode later for your pleasure. - Douglas Adams

And then, just when you think that you have experienced all the wonders that this world has to offer, you round a peak and suddenly think you're doing the whole thing over again, but this time on drugs.

"Sir Isaac Newton, renowned inventor of the milled-edge coin and the catflap!" "The what?" said Richard.
"The catflap! A device of the utmost cunning, perspicuity and invention. It is a door within a door, you see, a ..."
"Yes," said Richard, "there was also the small matter of gravity."
"Gravity," said Dirk with a slightly dismissive shrug, "yes, there was that as well, I suppose. Though that, of course, was merely a discovery. It was there to be discovered." …
"You see?" he said dropping his cigarette butt, "They even keep it on at weekends. Someone was bound to notice sooner or later. But the catflap … ah, there is a very different matter. Invention, pure creative invention. It is a door within a door, you see."
"Is this when you're wearing the helmet?" "Especially when I'm wearing the helmet!"

"But what about the End of the Universe? We'll miss the big moment."
I've seen it. It's rubbish," said Zaphod,"nothing but a gnab gib."
A what?"
Opposite of a big bang. Come on, let's get zappy.