Connections

Hero says "I'm not a babysitter!". The same actor is the hero of "Babysitting".

The door to the kid's room has a Darth Vader poster.

The kart sequence near the end has the kid with a mushroom hat and the guys sending huge plushes in the shape of a banana and a turtle.

Franck wants to watch that movie at the beginning of the film, and Rémi spoils him the ending as a revenge.

Rémi is watching this movie on his tablet in the lift at the very beginning of the movie and Franck tells him who's the killer.

While the writer says he had the idea before Project X came out, it's hard not to think of that previous movie when the party goes out of hand.

The general storyline is adapted from this movie