The limbs of the giant spruce that leans
  So close to the house, have formed
A kind of stair, a walkway
  Up to the summit. The squirrel that lives here
Scorns to descend it step by step‚
  But with an insane bravado runs
To a branch end, then drops
  Accurately off and, six flights down,
Arrives upright, pinecone in hand‚
  To remain there, tear at and eat it:
Perfectly secure, he is perfectly sane.