My mom said something so stupid, it left me speechless.

Me: So, I was contemplating buying a dvd, and I need your input on it.
Mom: Ok?
Me: It's a yoga dvd, for fat women. Instructed by fat women. It'll teach me how to do yoga in ways that my body can actually move. It's fat yoga!!
Mom: Well if it's instructed by fat people, it's obviously not helping them.
Me: .....
Mom: ...
Me: ....
Mom: ...
Me: ...What?
Mom: ....
Me: Yoga is about flexibility and meditation. It's not even ABOUT losing weight. You HAVE yoga dvds, you should know this. I just can't even...
Mom: I don't understand.
Me: I'm going to take a shower.