Spontaneous action is related with skillful means; it is related to working for the sake of others. This kind of action is not based on ego fixation or the desire for our own attainment of any kind of pleasure. it is action without pleasure fixation or ego fixation. Therefore, it is pure action.
From The Tantric Path of Indestructible Wakefulness, Volume Three of The Profound Treasury of the Ocean of Dharma, by Chögyam Trungpa, page 204.