Duckpan still executes when `$_` results to false:

![screen shot 2013-12-09 at 10 56 00 pm](https://f.cloud.github.com/assets/81969/1712077/2b56d8d8-6168-11e3-94bc-6afe853373ff.png)

You'd have to add a return statement below this to fix it.