In some fantasy sequences, a character's head is shaped like a penis.

Physical child abuse is implied through bruises of one of the main characters. Marty was physically beaten by a bully in one scene.

At least three usages of the word "fuck."

Vulgar words such as "shit", "dickhead," and some instances of "fuck" are used.

One scene took place in a rave party in a bar where a character of the film got drunk.