what do you think about movies that have the sudden endings to leave it up to you to decide what happend?

i think open ended movies are actually great - the thing with movies vs books is that movies leave very little to the imagination of the audience and to me that's delightful if you can make your audience go back and think well what if this happened?

some movies actually do leave a deeper impact that way and are probably remembered longer than most others just because the sheer amount of interest they generate as to what could have happened