Who says ATC and pilots don't have a sense of humor?

I got to fly this past weekend, but as a commercial passenger only on a quick trip back to visit family in the Midwest. 

I flew United, which for all the faults the airlines have these days, is the only carrier I know of that provides the ability to listen to ATC on in-flight audio, which I greatly enjoy.

I was listening to ATC somewhere over Nevada or Utah when a voice suddenly said "Hi, this is Bob..." and disappeared. Perhaps "Bob" tried to answer his cell phone but keyed the mic instead? Within seconds, came the cheerful chorus of "Hi Bob... hi Bob... hi Bob... hi Bob..." from the controller and a string of other pilots. I just about busted out laughing in my seat.

Now I have first hand evidence that controllers and pilots really do have a sense of humor.