The best hiding place no one found

The illustrious sandwich spent a summer in Dad's white truck. Chad was driving the truck around, to school, etc. I saw him put something behind the seat and *ding-ding* I knew where to hide the sandwich next. I hid it back there with his emergency winter coat and the tire iron. Well after a few months I remembered about it and was really tempted to slash the truck tires so my genious hiding place would be found. I'm sure if someone had a higher score on the Quantitative GRE the sandwich would have been found.