After watching a few too many of those ADD inducing 'Craziest Police Blah' shows during my lunch hour, his admonishment about pulling away may have been purely with your safety in mind. Several videos have featured pull-overs where either the cop or the pullee got creamed by a hypnotized or inattentive driver-by.

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1984 300D Light Blue/Blue
2006 C280 Silver/Black