I overheard this one.
A lady controller at E. NEMA airport gave a base turn heading to a commercial jet pilot. He read it back to her and then immediately went on to say, presumably intending to alert his cabin staff over the PA, but with the VHF still accidentally selected: "If you folks would like to sit down now, we're about to begin our final approach"...
ATC, quick as a flash: "I am sitting down!"
