There's a scene in David Fincher's adaptation of The Girl with the Dragon Tattoo where Martin Vanger (Stellan Skarsgård) politely invites Mikael Blomkvist (Daniel Craig) into his house, after finding him snooping around. The fact that Martin is the killer well known by Mikael and Martin knows he knows, but because of the human, the social animal need to follow, to be near, to group up, Mikael follows Martin, nearly meeting his end in doing so.