He had to avoid colliding with the snail since he was weak without his Cave Heaven to use. In his weakened condition, it would be easy for any one to injure him. So a snail that was moving as fast as a high-speed rail train would definitely injure him if it collided with him.
The speed of the snail was abnormally fast, and it caused him to widen his eyes in surprise as he narrowly dodged it. But after feeling shocked, he had to accept it simply for the fact that everything was odd here.
He said to himself, "The trees are white and smooth and reflect everything like a mirror. The birds can tunnel through the earth, and worms can fly in the sky. A snail that moves faster than a cheater is just one of the oddities here."
After speaking, he summoned a normal creature and a drone from his Cave Heaven to test something. Hammock had told him what would happen, but he wanted to see it for himself.
