When you accidentaly drop a bag in your trashbag and you have no idea what you had in it
I get that same kind of feeling when I lock my front door. I check to make sure I locked the front door. I get in my truck and drive about 3 miles and then suddenly wonder if I locked my front door.
i get that feeling when i eat a hamburger at mcdonalds...for the love of god... 'What was in that thing?'