Grilled Meat's page

You just get to move up to that speed. Nothing unique or different from movement than any other movement action you'd make.

So the movement is slowed down by difficult terrain?

Absolutely. This to me feels more or less the same way that, until recently, there wasn't ACTUALLY a rule prohibiting NFL players from kicking each other in the head while hurdling each other. You shouldn't have to say it explicitly... but apparently we do.

Well a RAW ruling is very helpful for PFS, because it might make a difference between being able to attack a flying enemy or not.