Some of these pictures and descriptions may give away plot details that you might not want to know before watching the film.
This is a very loose sequel to From Dusk Till Dawn (1996), the gory vampire movie that featured Salma Hayek's iconic snake dance. This one did not have the success of the original. (You know a movie has got problems when review headlines say things like "Not nearly as bad as people say it is.")
Five career criminals, a bank robber, an escaped convict, a dog fighter, a rodeo clown safe cracker, and a security guard, are rounded up in Texas to drive to Mexico and rob a bank for a big score. But they did not plan for vampires getting in their way.
As four of the crooks drive into Mexico in a 1959 black Lincoln Continental with a longhorn hood ornament and the Texas license plate "BYT MEE", we see the car drive past in the background and a snake crawling through the eye socket of a large cattle skull in the foreground. Later when the leader of the heist crew drives past the same spot in the background we see the skull with a tarantula crawling on it in the foreground.
When we the crew's leader enter the same Ti**y Twister vampire bar we saw in the first movie we get to briefly watch a woman dancing with a large python. Unlike Salma Hayek's elaborate production, this one is just background atmosphere. And so is the bar, which does not play an important part in the rest of the movie.
The first snake we see is a Burmese Python, a species from south Asia and which should not be seen in the wild in Mexico. The second snake is also a Burmese Python, but this time it's in its native habitat, right where it belongs - on stage in the arms of a sexy dancer.