More effective because of Hallyday's dodgy performance?
Johnny Hallyday is, let's face it, not an acting titan, but I found his clumsy performance to be quite endearing, to the point where it was hard to tell if any of it was on purpose, and what, given the memory defect the character has. He also has quite a strange accent, like what someone from Hong Kong or Macau may imagine a French person to sound like, if they hadn't met any.
share