Respect?

The spider moved around to match Anna's speed, but with the loss of its two legs, the spider had a hard time supporting its own weight. 

Anna took this opportunity to attack the spider from the back, but the spider shot out the web from its back.

Anna jumped to the side, avoiding this attack. When fighting against a spider demon, it would be better to attack the spider from the sides instead of any other direction, but there was a reason why she approached the spider from the back. 

When she avoided the web, the web continued to the opposite side of the room and struck the egg. The spider was already angry, so the force from that web was enough to drag Anna to the wall and trap her there. 

But since Anna dodged it, the egg had to endure that kind of force and ended up breaking.