Why “Random Neurons”?
When we had our first pair of cats, we used to watch in the evenings. A cat would be pacing slowly through the house and then suddenly jump up and bat at something invisible, or start racing through the house at full speed.
So much of cat behavior seemed inexplicable in terms of external stimulus, but rather due to “random neurons firing.” So that became our catch-phrase to explain bizarre cat behavior.
Come to think of it, that could apply to a lot of human behavior, too.