Left in a hurry

I saw this when returning home walking. I usually come back to home by car but not today...
That is an abandoned house. Nobody lives there, right now. And it was like that for at least 15 or 20 years.
I would like to know what happened in there for the owners to left those plants at the windows, and that window oppened. Maybe they left the house in a hurry. I will never know...