As part of a series of blog posts on Chaos engineering, this blog post introduces the open source library docker-compose-toolkit. Here, we use this library to define a Chaos experiment (using extensible effects) that illustrates the impact that auto-downing can have when an Akka cluster is subjected to network partitioning. The previous post Can Real World Distributed Systems be Proven Correct? motivates and explains the need for performing fault injection on distributed applications. In future posts, we will consider more realistic use cases than considered here - so please stay tuned!