Ok, please post the entire story
This happens to me all the time.
I love it when I see "one thing led to another" because you could put that into nearly ANY chain of events and it'll be funny. For example;
Adolf Hitler failed his art exam, one thing led to another and the USA drops a nuclear bomb on Japan.
This is a Seinfeld “yada yada yada” moment!
Was this written by a dog? Who was being helped, the attacking dog or the post man?