The Crawlspace Roll is a move introduced in Tomb Raider Chronicles. It enables Lara to get quickly out of crawlspaces. In Tomb Raider III and Tomb Raider IV The Last Revelation Lara had to turn around and exit a crawlspace feet first.
To perform the crawlspace roll the player crawls towards the edge and presses the Jump button to roll out of the crawlspace. This only works when there is a drop on the other side. Otherwise one simply crawls out and stands up.