Differences in British police tv shows vs. U.S. police tv shows…

DCI Barnaby: "Drop the knife !"
Villain: (advances with knife)
DCI Barnaby: (louder) "I said, drop the knife !"
Villain: (drops the knife)

Detective Voight: "Drop that knife, Scumbag !"
Villain: (looks around) "What ?"
Detective Voight: (raises gun) BLAM !!!