DISAPPEARING BLACK DOG- Is it really to ??

When I was 19, I was once out in the lorry helping another driver to learn the strings of the trade. All of a sudden from out of the bushes came a black dog just strolling across the road in front of us. The driver and I were staring at it wondering if it was going to move or not.

We were fixed on this figure, but when it turned it's head towards us it had no features; no nose, no eye's, no mouth, just like the silhouette of a dog and when we were about a metre away it just disappeared.

I've thought alot about whether it was real or not for the last 21 years since the sighting. Now i'm convinced it must have been real as the driver saw it too.