history: My neighbors dog dug a hole under my fence and chased me back into my house! I was out working in my garden when I noticed my neighbor's dog had dug a hole under my fence and was running right at me barking!
current: Did it scare you or did you make a new friend? It happened to me a few years ago and it turns out the dog just needed a friend. 
next: Scared the living hell out of me, because he's a pretty big dog! I ran inside and had to phone him up to come and get his dog.