I was once told by a "brother" how jehovah had protected him from a dog attack. He was going up to a house but didn't notice the pit bull sitting on the porch. The dog charges at him full speed and he cries out to jehovah and suddenly its like the dog hit a wall and fell down and sulked back to the porch before he ran away.
Even as a believing JW I was pretty sure that this was a case of someone with a fear of dogs (confirmed) failing to notice that the dog was chained to the porch. He was terrified of dogs so he didn't notice minor details and didn't stick around to realize that it wasn't, as he claimed, an invisible angel that stepped between him and the dog, but a perfectly ordinary dog chain.