My Mom would always know what I was doing or fixing to do. I ask her how she knew...She always said "I have eyes in the back of my head". Ok, I accepted that (though a little scary) So now I use that on by younger grandchildren and they all believe me except the 3 year old who called my bluff. He said "Nana you don't have eyes in the back of your head and proceeds to "inspect" my head for them and proclaims the back of my head "eyes free"!!
Which brings me to another saying: "My Mama didn't raise no fool"!!