Is it possible to make a 26 second animation with no music, and almost no voice-acting, sound or storyline that's still worth to watch? As we can see here, yes, it is.
The way how the old man sigh about what he saw makes you wonder, in what a chaotic, post-apocalyptic world does he exist? What did he saw already that he's not even slightly shocked? I like it that our mind is free to roam about his whereabouts and life so far.
Would be great if you could develop this world or this character (maybe both) some more, I would say the potential is there.