Let's see, he's in a courtroom, he looks like a caveman, and he's explaining something without seeming too bothered about the situation. At the very least, he's doing better than he "logically" should. While that doesn't illustrate the trope in full, it does a passable job at it.
If it's relevant, I've not seen the sketch in question, and I only found out about it just now.
Keep Until Better Image Suggested.