Once I lived inside a large garage, attached to a friends house. One Saturday morning I got up and started walking to the local supermarket ( about five blocks away).
A cop in a cruiser spied me- as I walked along the sidewalk, he moved his cop car just behind me, going about 2-3 MPH, keeping pace. He followed me the entire distance to the store this way. I went in the store... he parked his squad car and followed me in.
I lost track of the cop among the ailses...eventually, I went into the express checkout lane-then the cop emerged again, getting in line just behind me. He threw his purchase upon the conveyor belt- a bag of donuts from the bakery.