A US woman's essay containing just 19 words has gone viral - and surprisingly received top marks from a university professor.
Allison Garrett posted an image of her latest assignment, in which she was tasked with writing a review on a movie she had seen, on Twitter.
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Garrett said "the opportunity arose, and I took my chances".
She chose to write an essay on cult David Fincher film Fight Club, and simply wrote out these words: "The first rule of fight club is: you do not talk about fight club. That's it. That's the essay."
The sentence is one of the movie's best-known quotes, and gave her a metaphorical 'get out of jail free' card because the rule prevented her from writing anything further.
Astonishingly, she managed to score herself a perfect grade of 100 out of 100.
"I struggled with this grade for a long time," Garrett's professor wrote. "I finally decided you get a grade for a laugh and how relevant your review is for this particular movie.
"Let me warn you: do NOT try this kind of thing with other professors; they may not have my sense of humour."
Garrett's post has been retweeted a whopping 44,000 times.