Back when my very religious mom lived here she would decorate the house with angels and quotes/lyrics on the bathroom mirror and such, and I would always sneak "You can call me Knuckles, unlike Sonic I don't chuckle. I'd rather flex my muscles." onto the mirror.

We keep the bathroom mirror clean now but there's still one mirror with a quote where I left the text alone but changed the speaker to "Knuckles" and it makes me laugh.