Back when my parents first got married (late 1980's), my mom would get calls everyday from telemarketers and phone salesmen driving her crazy. So one day, dad got the bright idea to call mom from work playing like he was a lightbulb salesman. He disguised his voice, of course, and listed off many qualities of the bulb such as its power consumption, durability and brightness. Mom, trying to be polite, would kindly decline the offer but dad would fire back with a new perk. When mom said no for the final time, dad snapped "S--- lady, its just a d--- lightbulb!" She realized it was dad then and oh was she mad...
...and she got even.
She got one of her parent's friends to call dad playing like he was a mineralogist who had tested our land positive for oil. Dad got all pumped up and he was running around the office telling everyone including his dad (who was in on the gag) that he had struck it big time.
He hasn't prank called her since
