(teaching grammar) "Yakko, do you know how to conjugate?"
"Who, me? I've nevereven kissed a girl!"
"No, it's easy. Here, I'll conjugate with you."
"Goodnight, everybody!"
The fear of getting merge conflicts while developing a (software) project.
"Maybe we should do all coding on one branch, by one developer...", said the junior developer. "That is just your confundanturphobia talking, it will be fine", said the senior lead developer.