+ Describe an invented mental illness in scientific language, as though an entry in the DSM-IV. For structure, visit allpsych.com + Lovingly describe an over-the-top imaginary weapon, as though writing the sales pitch that appears in a mail order catalog. For inspiration, try crkt.com + Write an encyclopedia entry about an infamous (but fictional) massacre. For a model, pick your favorite at the wikipedia list of massacres *** Instigation is a WEEKLY department in Hellnotes newsletter. *** Congratulations to subscriber Terrie Leigh Relf, whose instigation-inspired story, "At the Ophthalmologist's Office," was recently published in FlashShot. If you publish or post…