I remember one summer day being hungover and suffering from the heat, i was dying for a white Magnum, so i decided to walk 10 mins to the shop to get one. I get there and pay for it and walk outside.
Outside standing next to the bin, i take off the wrapper and then I dumped the magnum into the bin and walked off with the wrapper still in my hand...I walked 100m down the road before realizing what i had done

So any funny stories of when your brain switchs off (either hungover or tired) and you are on autopilot?