I was in the Philly airport on Saturday, waiting at my gate for boarding to start. For some reason, the gate agents and the ground crew kept triggering the alarm on the door to the jetway. The alarm made a loud buzzing sound and had a strobe.
The first time the thing went off, the 60-something lady sitting a few seats over started getting crazy - "OH MY GOD! What IS that? What is happening? My God!!!" (etc.). Waving her arms and all kinds of nonsense. The alarm got triggered a second time, and there was a repeat performance from this lady.
On the third time, after her "OH MY GOD, WHAT IS THAT?" I turn to her, completely deadpan:
"it's an alarm, ma'am"
She was completely floored - staring at me open mouthed. I was trying not to start cracking up - her expression was priceless.
She didn't do it a 4th time.