Five exclamation marks, the sure sign of an insane mind.

The line is a piece of in-world editorial sarcasm from Terry Pratchett’s Discworld novel *Reaper Man*. It appears during a scene that riffs on the excesses of sensational writing and overemphatic punctuation—an authorial jab at the way excitement can be manufactured typographically rather than earned through content. Pratchett often uses such throwaway “rules” as comic commentary on language and genre conventions, and here he turns a copyeditor’s irritation into a memorable aphorism. The joke lands because it sounds like a stern maxim, but it’s delivered in a context where the reader can see how absurdly overblown the writing (or the writer) has become.

Pratchett’s joke treats a cluster of exclamation marks as a diagnostic symptom: when a writer needs repeated punctuation to force intensity, the prose itself has failed to carry conviction. The humor depends on exaggeration—“insane mind”—but the underlying point is practical: excessive emphasis can read as hysteria, insecurity, or manipulation. It also satirizes a broader cultural habit of equating loudness with importance. In Pratchett’s comic logic, restraint signals control and intelligence, while typographical shouting signals a loss of proportion. The line endures because it compresses a piece of editorial wisdom into a memorable, quotable barb.