OK, This graphic is totally hilarious but to "get it" you have to understand the context. The phrase, "We can't stop here, this is Bat-Country!" is a famous quote from the classic American novel, "Fear and Loathing in Las Vegas" by Hunter S. Thompson.
The basic plot of the book revolves around 2 characters, Raoul Duke ( based on Hunter S. Thompson ), and his traveling companion/attorney nicknamed "Dr. Gonzo". Duke is sent to Las Vegas to do a cover story about a Dessert Racing Event and his friend tags along. The book contains a TON of illicit drug use and that's the reason for the catch phrase used here.
You see, on their way to Vegas, they both do an insane amount of hallucinogenic drugs and Duke is seeing bats everywhere. His friend doesn't "see the bats yet" and Duke wonders if he should tell him about them. Anyways, sorry for the long explanation, but if you love the book then this graphic is really really funny!
If you would like to learn more about the book then please CLICK HERE!
Also, This book was made into a movie a few years ago starring Johnny Depp. Check out the video clip down below: