Once we went into the woods for mushrooms. And there was with us a relative of a friend, say police.
Go far inside the forest and there right in the middle of the road is a helmet. Can someone on a motorcycle or bike riding, and dropped. But we have something in the way.
So, our friend got out of the car, took out a pocket handkerchief so neatly using a handkerchief over the edge of the helmet was lifted and the party was postponed.
Says, the main thing - not to leave fingerprints.