I heard the rock95 one about tolls on the 400, they didn't fool me for ever a second, I couldn't believe how many callers were fooled
I had to test alarms in a large high school, so I made an announcement that the fire alarms would be sounding as they do each month, but for the yearly test today I needed to check the voltage on each horn or bell so instead of the alarms running for 5 minutes, they would need to run for a few hours nonstop, but they did not need to leave the building.....
few people were pretty upset at the thought of listening to that loud noise for a few hours
I had the test completed in about 5 minutes and everyone realized it was a joke...seemed funny to me at the time