What is Humor Effect?
Understanding Cognitive Biases
That humorous items are more easily remembered than non-humorous ones, which might be explained by the distinctiveness of humor, the increased cognitive processing time to understand the humor, or the emotional arousal caused by the humor.
A funny scene from a movie may be brought up in a review as a memorable scene. Humor has a bizarreness effect as the punchline is often something unexpected that breaks the current thinking and mood.
Everything you need to know about cognitive biases - definitions, examples, experiment.