It is said that a soap film will find the surface with the minimum area. If the two interfaces between the soap and the air meet, the soap film can effectively reduce its area by bursting. You would think that if you simply hold a soap film up vertically, all the liquid would want to go to the lower parts of the film (since this reduces the potential energy), hence leaving very little liquid or no at all at the top, making the two interfaces meet which would lead to the bursting of the soap film. However, this doesn't happen, and nature continuously keeps defying this logic since it usually takes quite some time before the soap film bursts, even if it is held up vertically. So how can a soap film be stable? Is there some force that keeps the two interfaces apart?