Everything about Bad Boys II looked like a massive turkey. The buddy cop action comedy is such a tired premise it feels like it’s been around since the silent era.

The last time a big name director made a fairy tale the result was M Night Shyamalan’s Lady in the Water, and we all know how that turned out. But the story of an old man born into a baby’s body only to age backwards as he grows up seems straight from the pages of Hans Christian Anderson and the Brothers Grimm.

You might have heard a lot of stories about how this surprise smash hit stayed at the top of the US charts for weeks and therefore think it must be a good movie. Before you fall for it, look at the economics involved.