The cobra is shown as having around 10 fangs descending from the roof of its mouth and arranged in two back to front lines, somewhat like teeth, whereas they only have two.
It takes a spider an hour to construct a web but the man-sized one in the cave mouth is constructed in just over a minute. But Seetha believed the God Shiva enabled the spider to accomplish this.
One can see the horizontal wire which is supporting the head of the cobra.