“Program speakers are determined by application, invitation, or result of an arm-wrestling match.”
“I’ve always loved Los Angeles…the beach, the weather, the horrific traffic.”
What is it called when you make a tripartite list like this, where the last element is incongruous and added for comedic effect? I coulda swore there was a name for it.
You may be thinking of the Comic Triple, pretty much the same as the Rule of Three, The first two items provide misdirection, your mind automatically goes to something else that fits with the other two, and then the funny comes from the incongruous third item. But the Rule of Three in comedy doesn’t necessarily take that form, it can just be three funny items.
That’s basically what it’s called. It’s a particular convention which embodies “The Incongruity Theory.” This doesn’t explicitly mention the “tripartite” aspect of the OP’s specific question, but it makes sense that you need at least two items to set up the initial pattern.