The ' Thunderstone Door Trap ', a nice mix of doors, traps, and Thunderstones!
Tired of kicking down dugeon doors? This one kicks back.
"The Pegoran saw the circle as the link between this world and the next," the mage said. Before he could pontificate further, "So the door rolled in Raygar to send him to the next?" the rogue blathered, "What a mad peoples!"
Faerie foods with unusual effects. Like faerie sausages that turn the eaters into wiener dogs, faerie wines that make the drinker whiny, etc. There's a table in Palladium Fantasy RPG which has a table of ideas.