Here is my DH's theory---There is a hook hanging in the door that we do not seem to see. The door opens the hook swoops down and does a brain snatch,. Then we wander around like kids in our favorite candy store filling our carts. The only way to avoid the hook is to make sure you have your list grasped firmly in your hand before getting out of your car. While in the store DO NOT set your list down until you have completed it and have passed safely beyond the cash register.This method has saved me from those ""Why did I buy this'''' and lots of 2nd and 3rd trips to get that spool of odd colored thread I went to get on the 1st trip.