“ A small, primitive village has yet to discover fire, which is a good thing because there are highly flammable (but not otherwise dangerous) gasses in the air. The heroes, blissful in their ignorance, don't know that and think it a wonderful idea to show the locals open flame.”
“ A pair of ladies lace gloves, that once donned, give the wearer a quick, and very tidy manicure. Nails are properly trimmed, sanded, and come out with either 'French' (insert game name) style nails, or their nails colored in the manner desired by the wearer. Useful for removing hangnails, and other cosmetic problems”
“ A slow, stupid creature that crawls onto people and latches onto them, often on feet, hands, and other extremities, numbing down the area and slowly feeding on it. It's easy to avoid while awake, but nearly impossible to remove once attached. Many an adventurer has been forced to hack off an arm or leg after waking with a Stoneleech wrapped around it. Sleep with one eye open! (This idea came from 'Wizard's Rule')”