AI-generated posters are becoming recognizable through their repeated use of aggressive, upward-slanting brushstroke lettering, prompting comparisons with the much-maligned Comic Sans. ChatGPT attributes the repeated aesthetic to training data that associates oversized, distressed lettering with dramatic, attention-grabbing advertising and promotional graphics. Unlike Comic Sans, which was designed for a specific communication purpose, the AI-generated lettering often imitates expressive typography without understanding its context, turning a once-distinctive style into a visual cliché.