Snails and Slugs are very distinctive, slow and thin. Many people may think of him as a calm animal and a very simple animal, but now they are not as simple as they look. Because they can crawl on knives and razor blades completely without any damage! And how many animals can do that?
Thanks to their muddy bile bodies, which reduce friction between their bodies and the blades, and the low pressure created by their slender feet, snails and slugs, they can easily slip off sharp surfaces that Can tear another animal to pieces. This feature is also due to the fact that the part of their body that can move is without any hard bone-like object, which minimizes the chance of friction. And when the friction is reduced, the process of breaking or cutting the body is also reduced or eliminated.
A mucous mucus that comes out of their body like mucus-like moisture which is one of nature's best lubricants and it helps the mucus to move on sharp objects without any harm.
This is further explained in this YouTube video