bus stop drawing

I'm planning a short film its going to be 15-30 seconds long I've been struggling to come up with a plot for a while and I think I've been over complicating the process I'm determined to start simple.

here i think is the starting point: the humble bus stop in all its glory. the question now is what happens at this bus stop? who is waiting there? an old man with a dog, a beggar asking for change? A pigeon harassing the dog? a plump policeman walking by tucking into a burger?