When Kevin and Perry land in Ibiza, they are seen leaving the airport terminal. as they are leaving, a young man in a Rangers FC shirt is seen walking past behind them. When Kevin and Perry notice their dream girls, the camera pans to the girls then back to them, where the same young man in the same Rangers FC shirt is seen walking past again.
The plot of the movie relies heavily on the premise of Kevin being a virgin and ends with Kevin apparently, finally losing his virginity but in S2 E6 of the BBC sketch show from which the characters, Kevin and Perry originate from: Harry Enfield And Chums Kevin has sex with a girl at a house party and the day after completely changes his attitude towards his parents and becomes really polite.
When Kevin and Perry are on their beds listening to Kevin's parents having sex, Kevin grabs his pillow to put over his head. As he grabs the pillow, he (possibly unintentionally) removes his hat. It appears that Harry Enfield's wig also comes off.
The film makes out as if the club Amnesia is in the middle of the town - as shown when Kevin's parents leave the restaurant, when in reality Amnesia is halfway between Ibiza town and San Antonio - in the middle of nowhere with nothing else around.
Eye-ball Paul's villa is on the Port Deportivo Marina. Every time Perry and/or Kevin is seen outside the villa, they subsequently walk along the jetty towards the water. These jettys don't actually go anywhere, so unless they travel by boat, they'd just have to turn around and come back again.