. . . I bet these things actually would be useful in a HD situation.
Have them effect everywhere but the bedrooms, "WHAT WAS THAT NOISE?" *flip switch* And the whole house is awash in pain . . .
Front porch - saleman, Jehovah's Witness, whatever . . . YEOWWW!
Or covering the backyard . . . armadillo starts digging, no safe shot due to neighbors (my situation
) and . . . zap!
(Now, if you could only make it work over the phone . . . on telemarketers!)