Just occasionally you find yourself in an odd situation. You get into it bydegrees and inthemost natural way, but when you are right in the midst of it you are suddenly astonished and ask yourself how in the world it all came about. If, for example, you put to sea on a wooden raft with a parrot and five companions, it is inevitable that sooner or later you will wake up one morning out at sea, perhaps a little better rested than ordinarily, and begin to think about it.

-Heyerdahl,Thor
  The Kon-Tiki Expedition: By Raft  across the South Seas (translated by F H Lyon).