Contact mics for acquiring vibration and resonance emanations are among the still classified TEMPEST offensive and defensive activities, along with other multi-sensory and -physical acquisition and transmission technologies. The celebrated EM components of TEMPEST are commonly used as subterfuges, ruses and ploys to divert attention from the non-EM -- which an almost limitless number of animals and other creatures use for SIGINT and COMINT, and a few like Brian, unfettered by industry conceits, use for full-spectrum HUMINT. TSCM pros have made much of the EM threat and little of the other, or pretend to do so. The US Embassy Moscow cavity resonance bug, and a few others, are highlighted for the same diversion from the slew of others inadvertently ignored. Thanks again to Brian for broadening the discussion from narrow focus on crypto prowess and simple-minded EM and TSCM, a narrowness which might be considered a long running ploy not so different from the Snowden gush generating reams of Chicken Little narrative beloved by the comsec industry guided by its nose toward cash and ignoring its tell-taling stench.