Quote from jrdragon2003
I think it might have to do with his sheer destructive power, after the timeskip I think he mentioned not being able to hold back. And if that's the case he was probably looking to avoid damage to any friendlies nearby. Though my theory could be moot depending on the next chapter.
Yeah, I too think that might be the case. But it might also be that he did not wanted to accidentally cut open the building's walls, which would create an opening into the building for the "Shinokuni"(the gaz).