How does mr antolini upset and scare Holden?

Mr. Antolini upsets and scares Holden when he pats him on the head while he is sleeping, as it crosses Holden's personal boundaries and makes him feel uncomfortable. This physical gesture, combined with Mr. Antolini's drunken behavior and his comments about Holden's inability to take advantage of opportunities, leaves Holden feeling vulnerable and distrustful.