From my memory, creates an object, gets all the other active nodes in the cluster, moves them to that node and then back to the original node, showcasing the object passing feature of the language.

It moves the Kilroy object around all the active nodes in the cluster, and then back to the origin node at the end.

I believe it's a play on this:

https://en.wikipedia.org/wiki/Kilroy_was_here

It moves the running object/process between nodes (vms/machines) of a cluster, then back to the origin nodes.