Continuity mistake: When they are trying to pop Lucas' arm back into its socket he has a ball gag in his mouth. Watch, as the depth of him sucking on the ball gag changes. Sometimes it's near the front of his mouth, sometimes he has it almost completely swallowed.
ckbyers
19th May 2020
Good Boys (2019)
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Suggested correction: I rewatched the scene three times and I don't think it is a continuity mistake. It is true that sometimes the ball is mostly outside of the lips and other times it is mostly in the mouth. But there is a pattern - out, in, out, in, out. I get the impression that the depth of the ball in Lucas' mouth correlates with his breathing (inhaling or exhaling) and/or varies with his arm being pulled by Max and Thor. The ball goes lower in his mouth when Max and Thor start yanking.