We had been finishing up a multi, and the final was behind a fire department. I saw it in the bushes, and pointed it out to my wife, who went in for. She pulls it out onto the sidewalk, next to the member entrance for the fire department. As she sits there, opening up this .50 cal ammo can, a fire fighter comes out the door, asks if we need help, and see her sitting there struggling with the can. I quickly explained it to him, his Lt, the Captain, and then the Chief what geocaching was.
Now I work closely with them and they remind me of this moment occasionally!