Forgive me, I would imagine this would've been asked before but can't find anything. Here's the questions: Does tumbling up to 20' (as part of a normal movement) mean I can actually move 30' (or more, depending on my movement rate) total, with any 20' segment being "tumbled"? Can I move before and after I tumble? If I attempt to tumble through an area and fail the DC 15 check, can I halt my movement before I tumble, or do I move as I plan before resolving the tumble skill check?, thus provoking any number of attacks of opportunity.