@'ko:
wow that's waaaay too much over-analizing a simple color-spread. So, in any other color spread in any other manga in history, who are the characters posing for? Who's taking the photo? It's just an image made for the cover of a chapter, and yes the meaning is that Naruto is fakingly "popping" the fox's bubble with false perspective… man, yes, you're nitpicking
In other colorspreads, it doesn't matter because it doesn't rely on the perspective trick, but Naruto popping the bubble only makes sense in the context that someone was taking a picture or something
Like if the kyuubi's snot bubble was some sort of Konoha leaning tower of snot