If you want to continue parallel, Lazy that beast, if you want to go perpendicular, Theif (Also called the Lazy-Pivot-Dash, basically, a Lazy where you turn half way and come out facing Perpendicular)
That's how I'd do it anyways... But then again, this is an obstacle that you must overcome, use what you know and what you are learned to asses the situation and decide the best method to clear it. If you drill the moves enough and understand the use and practical reasons for each then it should basically be instinctual to choose the best one for the job
That, AND, Parkour is very personal so what might work for me could be detrimental to you and vice-versa... so yea, just try it and see what works
-Kyle(Rage)