Righteous Kill - Robert de Niro and Al Pacino reunited on screen for the first time since Heat, but actually, it was the presence of Brian Dennehy that really gave away what kind of film this was. It was directed by Jon Avnet, who, after this was released and was followed by 88 Minutes, was renamed Not 'Avnit.
The film had a massive TWIST AHOY! signposted throughout, so anyone who didn't see it coming really wasn't trying.
One listener felt that Righteous Kill's tagline - "there's nothing wrong with a little shooting as long as the right people get shot" - was especially crass, given that it appeared on several London Underground trains at the same time as the Jean Charles de Menezes inquiry.