meow

So I was sitting in my basement tonight trying to read my psychology book and all of the sudden a can hear a collar cling-clanging sound, so angrily I think it's my dog Lacy who knows she's not allowed downstairs. I go out in the downstairs familyroom and there by our pool table is a cat...we don't own a cat... How the heck did a cat get into our basement! It ended up being our neighbors cat that they had been looking for all night, I wonder how long it had been in the house! Anyone have any speculations as to how it got in? I checked all of the doors and windows downstairs, do you think a neice or nephew let it in?