Other mistake: They make it clear to us that the portals are one-way gates (from origination to destination). However, the last portal is two-way.
The Dark Tower (2017)
1 other mistake
Directed by: Nikolaj Arcel
Starring: Matthew McConaughey, Idris Elba, Jackie Earle Haley, Katheryn Winnick
Continuity mistake: When the Gunslinger rescues Jake in the forest, he fires far more shots than we see his gun is capable of holding when he reloads it.
Man in Black: You really think you can stop me, gunslinger?
Trivia: At the scene where Jake and Roland are walking through the rusty theme park in Midworld, there is a huge sign saying "PENNYWISE", the name of the demon clown from "It", also by Stephen King.
Answer: All the bully really did was take the book out of Jake's hand and Jake violently assaulted him in retaliation. Jake's action was much worse. Also, we are never actually shown what punishment the bully received, he very well could have been punished in some way that was never mentioned.
BaconIsMyBFF