Except that the molecules that make up the bubble are not infinitely small. To expand a bit: Yeah, on a human scale, the bubble looks spherical, but when you

Except that the molecules that make up the bubble are not infinitely small. To expand a bit: Yeah, on a human scale, the bubble looks spherical, but when you look at it on a small enough scale, you start to see behaviors that are far removed from the continuous functions that one would expect from Newtonian mechanics.