chain of prevents
A chain of events that prevents you from accomplishing anything important.
Billy: "Did you do the paper for history last night?"
Edwards: "Well, I started it but then Jimmy showed up with a twelve and showed me some videos online and... long story short, I didn't get it done because of the unexpected chain of prevents."
Edwards: "Well, I started it but then Jimmy showed up with a twelve and showed me some videos online and... long story short, I didn't get it done because of the unexpected chain of prevents."