Once I bought a really expensive car perfume (the one with liquid in a small bottle) and stuck it onto the center armrest....After five minutes, instinctively lifted the central armrest and WHAM....all the liquid perfume was on the mats 
Once I opened the door of my car with and sat in the car with the keys still in the door lock. I started looking all over the place ke chaabi aakhir gayee kahan...After sometime a man approached "bhai sahab...chaabi darwaze mein lagi hai" 
Once installed a JVC detachable panel in the car, parked the car that night and forgot to take the panel with me....Obviously it was stolen that very night 