Some problems shrink after laughter restores their actual proportions.

Laughing at a situation is a form of stepping outside it. For a moment you are not inside the problem, you are looking at it, and from there its actual size becomes visible. Nothing changed except your position, and that was most of what was distorting the scale.

When something has grown too large in your head, tell it to someone who will find a piece of it funny. Not to dismiss it. Just to get far enough outside for a moment to see it clearly again.