"Arthur!" he said, "this is fantastic! We've been picked up by a ship powered by the Infinite Improbability Drive! This is incredible! I heard rumors about it before! They were all officially denied, but they must have done it! They've built the Improbability Drive! Arthur, this is ... Arthur? What's happening?"
Arthur had jammed himself against the door to the cubicle, trying to hold it closed, but it was ill fitting. Tiny furry little hands were squeezing themselves through the cracks, their fingers were inkstained; tiny voices chattered insanely.
Arthur looked up.
"Ford!" he said, "there's an infinite number of monkeys outside who want to talk to us about this script for Hamlet they've worked out."
The Infinite Improbability Drive is a wonderful new method of crossing vast interstellar distances in a mere nothingth of a second, without all that tedious mucking about in hyperspace.
It was discovered by a lucky chance, and then developed into a governable form of propulsion by the Galactic Government's research team on Damogran.
This, briefly, is the story of its discovery.