9. Remember Me
The last few minutes of this film deliver what one critic has called a "borderline offensive final twist", so really it was made to appear in this list.
Remember Me is a 2010 romance coming-of-age drama with a twist and the twist - get this - is that at the end the protagonist dies in the 9/11 attacks.
Literally out of nowhere, as main man Tyler waits in his father's office (in the North Tower of the World Trade Centre), a cutaway to his younger sister's classroom reveals the date to be September 11th 2001; then in a matter of seconds it cuts to black as we infer the planes strike the Twin Towers.
Instead of having the film end on a positive as relationships began to heal and the future stretched out ahead of our characters, for apparently no reason other than shock value we just had to drag 9/11 into it.
As with anything concerning that historic, horrific day, a lot of people were upset. For what could've been a quite nice film it ruined its chances in the last few minutes by playing the exploitation card, and there's no coming back from that.