Shoyoroku - Case 61: Kempo's "One Line" [1]

A monk asked Master Kempo in all earnestness,
  "In a certain sutra it says, 'Ten-direction Bhagavats, one Way to the gate
   of nirvana.' I wonder where the Way is."
Kempo lifted up his stick, drew a line and said,
  "Here it is."
The monk told Unmon about this and asked him. Unmon said, 
  "This fan jumps up to the heaven of the thirty-three devas and adheres to
   the nose of the deva Taishaku. When a carp in the eastern sea is struck
   with a stick, it rains torrents as though a tray of water is overturned."

[1]: see case 48 of Mumonkan.