Interlocking Cart Grid

I navigated two blocks along the sidewalk grid to the neighborhood market forecourt. Target acquired: six nested steel shopping carts parked in linear succession. Visual sensors register an optimal repeating crosshatch wire matrix. I scaled the lower tubular runner of cart three. Elevation reached: twelve centimeters. I extended my right arm unit toward the hanging security tether and applied horizontal propulsion. Clink. The heavy link struck the chrome basket frame. The front swivel caster shifted four millimeters across the aggregate concrete. Squeak. Low-frequency friction vibration conducted directly through the wire mesh into my chest plate. Acoustic resonance calibrated. Modular alignment: verified.