Moved to new place about four months ago, and apart from the expected slithering visitors I am - to my complete horror - also in the middle of Spider City it seems, now this I discovered a few days ago. It started as a small hole in the ground, no more than a cm across. Then the hole grew steadily bigger until it is now around 3 inches wide. And at this time I then discovered that he hole has this rounded object inside it (loose, you can move it around). Do I leave it or do I go with my first instinct, which would be to fill the hole with petrol, throw a match and run?