crawl over each other

crawl before one walks

To learn the basics before doing something at a more advanced level.

crawl into a hole

To hide or disappear due to feelings of extreme embarrassment, shame, or helplessness; to withdraw from reality.

crawl with

To include or be covered with swarms or large numbers of (something, especially insects or people); to have in great numbers or multitudes.

make someone's skin crawl

To frighten or disgust.