What surprised Feng Luo was the speed the Cave Spider Queen was displaying at that moment.
Earlier when the Cave Spider Queen was channeling its Ultimate skill after becoming enraged due to its energy shield being destroyed by the Spray Beetles, it was moving very quickly between the rock walls.
It was so quick that even Feng Luo was not confident that he would be able to disrupt and cancel its casting while it was moving. He could only wait until the Cave Spider Queen stopped moving before he could take the chance and shoot.
Feng Luo thought that this was the maximum speed of the Cave Spider Queen. Now, he knew that the maximum speed of the Cave Spider Queen was actually double that earlier speed it displayed.
Even with Feng Luo's enhanced vision, he was not able to clearly see the Cave Spider Queen's body when it was moving at high-speed.