Loudly play the Ducktales theme. When they hear it, they will go insane with repetitive stress, until they start to question all existence, cogito ergo sum is thrown out, and all that exists or doesn't exist turns into "Ducktales, ohh woo ooo". There is no greater form of mental torture. Of course, you will also succumb to the madness, until you and your family and depending on how loud your speakers are, your neighbors fall into a Lovecraftian orgy of blood and insanity. Small price to pay for the necessary retribution inherent in interrupting your tap dancing lessons.