Take a tictac candy. Now find a road that's about 1400KM (870mi) long and pick some random point on there to drop it. Wait a week for other passing traffic to

Take a tictac candy. Now find a road that's about 1400KM (870mi) long and pick some random point on there to drop it. Wait a week for other passing traffic to disturb it, maybe get caught in a tire and sent even further astray. Now go find it, remembering that even with sensitive equipment, you might need to be a few tens of meters away to pick it up out of the background radiation.