A video montage that conveys a message and tells a story.
From a literal standpoint, this story is about a person who goes on a journey to buy a gallon of milk, then get confronted by a random pedestrian. The pedestrian throws a banana peal and unknowingly causes the main character to fall, and destroy the gallon of milk that he went out of his way for.
From a figurative standpoint, this story can be interpreted as how we as humans are constantly trying to accomplish great things, but we are at the expense of random things that we cannot control. This is a metaphor for life.