Continuity mistake: After the first car accident, just before they are hit by the second car, the amount and pattern blood on Kale's face changes slightly at least once, most notably a large scrape on the side of his face that seems to almost disappear. (00:04:10)
Plot hole: There is no way Turner should have been able to fool Kale into thinking that he was the club girl, due to obvious differences in his physical appearance to the club girl. Such as his much blatantly larger size and height, especially if he needed fit into the black dress she was wearing (and to top it off, it does looks very much like the actress when "she" gets into the car).
Other mistake: After falling in the pit of water at the end, there is at least one shot (if not more), only a minute or so later (when Turner is stabbed in the leg by Julie), where Kale's shirt appears to be completely dry, when it should be still quite drenched.
Continuity mistake: In the classroom scene at the beginning, on Kale's desk is a white book (likely a Spanish dictionary) that is lying on top of a red book and keeps changing position without him touching it. (00:06:45 - 00:07:10)
Continuity mistake: During a close up shot where Kale is writing the garage code that Ronnie is giving him on a notebook, we see a pair of binoculars lying flat next to the notebook. We then cut to a wide shot from behind Kale, and the binoculars are now standing up on the large lens. (01:04:55)
Chosen answer: When Kale goes in Mr. Turner's house to find his mom, he finds a red wig and heels (when he saw the girl leaving Mr. Turner's house, that was Mr. Turner wearing the wig and taking her car to make it seemed like she had left safely).