I love how when the "snake" chased him down to the restroom was a venomous snake targeting its prey but when the guy opens the door for a split second, it shows the girl in a completely concerned state and is not a "snake" anymore. For me it felt like, her anger and annoyance from the guy neglecting her made him envision her as a snake and as the "snake" chased him to the restroom was just her trying to approach and is worried for the guy.