My mom once called me telling me her internet was not working. Prankster me told her that the whole internet closed at 7 pm. She was like "okay, I'll wait until tomorrow morning then" (it was around 8pm)
I couldn't help laughing like crazy as I didn't expect her to believe me.
Of course I helped her out so that she could have her game of poker. (She won $10.000 that night) :-)