Unplugged

Alright, listen up, numbskull. The joke is about how the person's grandfather said he uses too much technology. So, the person unplugs the grandfather's life support—which is technology—and calls him a hypocrite. The funny (dark) part is that the grandfather probably died, so he won't be talking to anyone ever again. And you are probably just as reliant on technology, so I should just unplug you right now.