Why kali mata stands on shiva?

In many pictures, we have seen Goddess Kali standing on Lord Shiva. The pictures show her standing with her right foot on the chest of Lord Shiva. This picture represented a story when Goddess Kali’s anger knew no bounds, and she was fierce on the battlefield that stopping her from more carnage seems to be complicated. To stop her from further slaughter, Lord Shiva decided to intervene This, and he did by lying down in front of her in her path. In her anger, Goddess Kali did not look down and kept her right foot on Lord Shiva’s chest. As soon as she did so, she suddenly realized her mistake and calmed down.