A Singapore devotee once asked Amma to visit a Hindu temple where he went to pray. Amma told him that there is no need for Amma to be physically there as Amma's omnipresence is always there through Durga Kali.
One day while the devotee was praying to Durga Kali, he noticed that her head projected out from the statue and looked right at him. After which, Durga's head returned to its original position. This phenomenon confirmed to him, Amma's omnipresence in the temple. As a mark of respect for this wonderful experience, this devotee makes it a point to fast on every Thursday evening to Friday evening.