Jimmy Timmy 2: When Nerds Collide Easter Egg - Friday the 13th

As Jimmy is experimenting with Carl and the ladder, if you look behind him you can see hockey masks and after the experiment is over and Jimmy is about to ask Cindy to the dance you can see that she is holding a hockey mask. The hockey mask is a reference to Friday The 13th because the killer Jason Voores wears a hockey mask. Happy Hunting!