Where does She get it ?

This morning Makynzie woke up somewhat early and I was still home so after she ate some breakfast she went into the living room and laid in her little sleeping blanket. She was laying on her front side and had her butt up in the air. I put my foot on her butt and started shaking her with my foot for about 5 seconds. After I was done she goes "Do it again" with a smirk on her face... so I put my foot back up on her butt and start to shake her when she lets out a fart and starts to laugh... I couldn't believe it, just like her Mother :)