Phil has several psychotic rants with telephone customer service representative including threatening them.

Phil calls a postal delivery worker an offensive slur used for disabled people.

A lot of swearing throughout the movie including various iterations of the f word.

Kevin states he took three lines of coke (offscreen) to Phil when he calls him after being fired.

Phil takes a couple swigs of alchohol before smashing the bottle.

The scenes where the main character is very hostile and threatening towards the customer service representatives can be very intense and disturbing.