It's a portal. If you stand next to it too long, have it drop you into a random area of a random zone. Fun places like Eden, Cimerora, the Storm Palace, the Easter Egg room in Faultline, inside the BAF, or the outskirts of the Nightward. Better, have it drop people into an instanced mission map that can't be won or quit out of; the only escape is dying or finding & clicking on a hidden door.