puts in an After hook does not output anything

Per [this stackoverflow answer](http://stackoverflow.com/questions/10526894/cucumber-puts-in-after-hook-not-outputting-anything)

    After do
      puts "hello"
    end

does not actually write out anything.  If there's another scenario in the file, the 1st scenario's After-hook output will appear in the 2nd scenario's flow.

I'm trying to write an `After` hook that will allow me to check why a scenario failed, and if it was a particular exception, output some useful text to tell the person how to get past it (which is unfortunately a manual step, but I'd like to be more friendly than a stack-trace).