Kitty says "Meow", Bear says "Rahhr", Doctor says "No, no, no"- what?

In the last few weeks Evie has had to go to the doctor for minor things. I hadn't noticed she picked up a new trick before heading there. The doctor walks in and I tell her to say hi to the doctor, she shakes her finger and says "no, no, no." Um... slightly embarrassing! Then about two weeks later we're at a different doctor and after he leaves I tell her "Wasn't that doctor nice?" and she replies with the finger shaking again and saying "No, no, no!" What?? I cannot believe she came up with this on her own! So then I start asking everyone if they've taught her this... no one knows anything! Hmmm... weird.
Last night we sat down to read books before bed, she picked one of her favorites for the night: "Five Little Monkeys". As we're reading I suddenly realize where she learned this "no, no, no" thing at- ME! The last phrase on every page is "Momma called the doctor and the doctor said, No more monkeys jumping on the bed!" and as I say this each time I shake my finger and she always mimics me! Silly girl!!! I couldn't believe she absorbed that and associated it later with the real doctors! At least I know now there isn't anyone (besides me) teaching her bad tricks!