The Perfect Wife Walked Away
Even through the gag and the terror, the scientist in me registered the information, catalogued it, understood its implications.
A mercury tilt switch. One of the oldest and most reliable anti-tampering mechanisms in existence. A small capsule of mercury positioned so that any significant change in orientation — any tilt beyond a few degrees from vertical — would cause the liquid metal to flow into a contact point and close the circuit with lethal results.
"It means you can't be moved, Alice," Lily continued, watching my face with open fascination. "Not tilted, not laid down, not carried horizontally, not shifted in any direction. The moment your body angle changes by more than about fifteen