Have you ever gone to the grocery store to buy specific ingredients and then gotten home only to discover one of those items which you KNEW you had placed in the cart was not in your bag? That happened to me a couple weeks ago with an avocado. I was a little miffed that obviously it got left on the counter after it was scanned rather than put in my bag. Avocados aren't cheap after all.
I just came in from cleaning out my car and guess what I found wedged under one of the front seats?