So i went up to Dennison Ohio to visit a friend for a few days and brought my M6. I found a park near his house and proceeded to search a bit. i found several "plugs" and as i swept over the plugs, my machine sounded off. Under each plug was a piece of trash. Whoever did this did a lousy job cutting the plug, but left the trash in the hole. Come on now, at least take the trash out and dispose of it.