Ethan is seen rescuing Zooey from a group of boys in the washroom then proceeds to carry her out of the nightclub. In The Bodyguard, Kevin Costner's character rescues Whitney Houston from her fans on the stage and also ends up carrying her out of the nightclub.
When the student is talking to Ethan after he is picking up Zooey at school, the student makes a cowboy reference. Kevin Costner played western lawman Wyatt Earp in Wyatt Earp (1994). [Alternatively, the "cowboy" reference could also be to Costner's even earlier breakout role in 1985 in the great movie, "Silverado."]