There's always someone on a conference call that forgot to mute their phone. You can hear them eating, or typing, sometimes you get them saying something they shouldn't.
This one takes the cake. The Blazers were hosting an introductory teleconference for Pau Gasol and heavy mouth breather didn't realize their phone hadn't been muted. So they stopped the call to ask people to PLEASE mute your phone. They reallllly weren't paying attention because the heavy breathing continued! And they had to stop the call AGAIN.