I agree, the more you know indeed.
We both agreed it was an obstacle in which case I believe you are right and we played it right. However, what I was pointing out is if we were to declare it an obstruction, which I think is 2in or more in height?, then you wouldn't be able to charge over it.
On that note, I love how Acrobatics doesn't confer you pathfinder as well! lol. I can leap frog over your jack...but not this little rock over here! lmao.