Coining A Turn Of Phrase

(My dad drives an extended cab Chevy Silverado and Mom and I have just finished shopping at the local mall. She doesn’t drive the truck often so she’s not used to it and is taking extra care to make sure she has plenty of room navigating the parking lot. She has just completed a turn. I’m about 8 years old.)

Me: “Why did you take such a big turn?”

Mom: “To make sure I don’t bump into things. This truck doesn’t turn on a dime.”

Me: *having never heard this phrase before* ‘Yeah, it turns more on a quarter.”

(She had to stop the truck, she was laughing so hard.)