Here's a longer clip, which includes some conversation with other flights nearby and further coordination. A lot of these people sound unconcerned at first, but their job is to stay cool, just like the airplane crew. Emergencies are just another task for them- getting all worked up about them doesn't help anybody. It's a good example of great controller/flight crew work, I think.
One odd thing is how the flight # changes from 1549 to 1539 to 1529, as far as I can make it out... I think that was one place everyone's nervousness leaked out.
http://www.avweb.com/podcast/podcast/Au ... w=HomePage