"Or that she's going to blow up our kitchen."

^ This. My parents had a bad cutoff valve in their bathroom and shot a stream of water at the wall. They were out of town when it happened, so the water was so powerful that it cut a hole in the wall and flooded the entire upstairs, ruining the hardwood as well as the drywall in the basement.

There's a lot of pressure behind our water lines. When they burst, it can be damaging.