A classic zen koan:
Two monks watch a temple flag waving in the wind.
One says to the other, “The flag is moving.”
The other replies, “The wind is moving.”
Huineng, overhearing, says, “Not the flag, not the wind; mind is moving.”
The tantra of this experience is recognizing that the wind, flag and mind are all experiencing the same motion – a motion that does not truly belong to any of these objects, and yet resonates through all of them. Then with this recognition, sudden stillness.