After unsuccessfully trying several avenues of escape, she crawls through a pet door and ends up on her porch, a dead end.
en.wikipedia.org While crawling, infants gradually practice standing, at first by using people or objects for support and, later, without support.
en.wikipedia.org He later discovers that when he crawls under his bed, on purpose or by mistake, he enters a different world.
en.wikipedia.org It also requires a significant physical contribution from the guests, not simply walking through, but running, climbing, crawling, sliding, and occasionally swimming and/or rowing.
en.wikipedia.org