What we learned from 10 of the year's biggest box office failures

We all mess up sometimes. That's life, and no one's perfect. What's important is to learn from our mistakes.Looking back on 2015, Hollywood could do the same. This being the last week of December, there's no time like the present to survey the year's most catastrophic misfires and find the teachable moments within "Mortdecai," "Aloha," and a handful of other movies no one bothered seeing.