Tumbling Crawl( Complete Scoundrel, p. 90)
[Movement, Skill Trick]
You can safely roll away from danger.
Tumble 5 ranks,
By succeeding on a DC 15 Tumble check, you can crawl 5 feet as a move action without provoking attacks of opportunity. Crawling normally provokes attacks of opportunity from any attackers who threaten you at any point during your crawl (PH 142).