Funeral procession

A man was out for a walk and saw a funeral procession. But this one was strange. There was two PRIEST... then a man and a dog walking behind them... then a very long line of people. Curious, he went up to the man and asked, "who died?" The man answered "my mother-in-law and my wife" So then the man asked "if you don't mind me asking, how did they die? " The man answered "my dog killed them" The man thought for a moment then asked "Can I borrow your dog?" The man pointed behind him and said "Get in line"