This is not the product demonstration room. The researchers have no idea where that fire came from.
Even worse: The horror-doll siblings don't merely roll (they're perched atop modified Segways) into a fire scene, squirt some retardant about willy-nilly, and return to their nooks, never to be seen by human eyes again. They're meant to interact with people, via "a booming voice," and visual recognition technology that "algorithmically computes how to handle discordant or contradictory information." So you can't even kill them with a paradox -- mankind's only surefire weapon against robots!