I'm currently running Carrion Crown for my friends, one of whom knows the rules much better than I do. During one combat he used a full round action to move behind the enemy, through 3 separate threatened squares. He called it a "reposition" action; given his extensive knowledge, I just rolled with it and moved on with combat. I was thinking about it later and was curious so I went to look up the specific rules for it, but have come up blank.
Was I just deceived, or are my searching skills just sub-par?
Links or full notated rules appreciated.