When you're a little kid, there's nothing cooler than seeing old people do stuff that makes them look silly. And for old people, they just don't really care if they look silly or not. So it's a win-win for everyone involved!
Somebody recorded their grandmother listening to headphones and rapping along to Jay-Z's "99 Problems." In case you're not familiar, there is some vulgarity in the song, but that didn't stop Grandma...not even for a second! And boy oh boy were the kids completely delighted with Grandma's rap debut!