Balloon?

Overheard at Eisenbrauns today:
One customer service rep to another, "What's that sound? It sounds like a balloon being blown up. It's coming from James' office."

Rep two, "Oh, that's his head expanding. He must have just read Joe Cathey's post.

Rep one, "Quick, get a pin before it fills the whole place!"

POP!!!

Peace descends again...