Grrrr...

what do you do when you are riding home from work in the passenger seat of a friend's car at roughly four in the morning, and you see something walking across the street just in the shadow and out of the path of the car headlights...this thing looks like a big dog--a great dane--with head hanging down and tail long, but not nearly the size of a great dane...no, much bigger...like four feet at the shoulder bigger...and you say to your friend, "What the hell is that thing?!?!" while pointing because you can still see it walking off into the bushes and she doesn't see a thing and still can't, even as you pass the point where it disappeared...and at that point, you realize that there is no way you will ever be able to walk home that way in the middle of the night ever again for fear of something you didn't quite get a good look at, and aren't sure if it exists, but it is bigger than you and might exist less than a mile from work and home...what do you do?