The Exercise:

Moving as slowly as possible, step forward with the heel to the ground first, let the weight of the body shift along the outside edge of the foot to the small toe and across to the large toe.
As the weight of the body fully aligns with that foot then begin the transition of shifting to the other foot.
Small steps are recommended as balance may be challenged.
Maintain good posture, with shoulders relaxed and head erect. use your breathing.
The challenge for this exercise is that no matter how slow you are walking, you can always go much slower.

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Commentary:

The purpose of the exercise is to challenge your normal pattern or rhythm of walking so that you can learn to reconnect with very subtle energies in the body as the weight shifts from side to side in an extremely slow walk.
You may discover the point-to-point connections of movement and/or the merging into
the experience of flow.
The extreme slow walk may be practiced any time. Variations that are added in class: Walk with music.
Walk with eyes closed.
Walk singing long tones – one per breath.
Walk backwards.

Source: Deep Listening: A Composer's Sound Practice