I'm watching President Obama's press conference, and note that he has a list he follows to call on the next reporter. I've been in plenty of situations where I might be the next guy called on, and while you're waiting to see if your name comes up, you're a bit tense.
These reporters have to address the President, on live TV, so imagine what they're thinking as they wait to see who the President will call on. "It might be me. I hope it's me. Jeezus, what if it's me and I screw up in front of the most powerful man in the world on worldwide TV? I hope it's not me." That's got to be nerve wracking. But, most of the reporters handled it with aplomb. More than I could do, I think.