Other mistake: When Darry is in the basement under the church, Darry is laying on the floor surrounded by a circle of sunlight appearing through the pipe. Then follows a series of cuts between Trish at the open end of the pipe, and Darry. Why do we not see a silhouette of Trish on the floor rather than a perfect circle of light?
Other mistake: When the Demon has just ripped the tongue out of the police officers head, and he has eaten the tongue, when he is finished he puts the head in the back of his truck. Where on earth did his truck come from?
Other mistake: After the creature flies out the barred window with Darry, you see some bars missing from the earlier intact window, but where some of the bars are missing, there are intact bars surrounding it. The creature couldn't make a hole in two different places while flying out.
Other mistake: When the guy with the stitched up chest dies, Darry starts walking back towards the pipe. In the next shot, it looks as if he's turning around and not walking towards the pipe. It was obviously taken from the previous shot before he saw the stitched up guy.
Other mistake: After the creeper cuts the cop's head off, how could the car both brake and steer?
Answer: There's no reason he couldn't use a gas station. In the dark he just looks like a guy with dark skin, unkempt hair, and a trench coat. Even if somebody does get close enough to get a good look at him, he would easily kill them to keep his secret.
BaconIsMyBFF