When Kia dozes off in class, Freddy appears and flicks her nose from her face with his knives. She isn't injured when she awakens, however - something that would have happened in previous Freddy movies - because he won't grow powerful enough to make dream-injuries carry over into reality until Mark blabs about his return to the whole school, thus re-empowering Krueger via mass teenage fear, a couple of scenes later.
When Freddy discovers Jason's weakness to water, he adds insult to injury by showing the dismembered head of Jason's Mother in front of his child form. Now Jason is a Genius Bruiser when it comes to killing, everything else however he is not so smart. So when he sees his mother's head he comes to the logical conclusion (in his point of view) that Freddy is the one who killed Mrs. Voorhees. When Freddy enters the real world, Jason even stops going after the others just to confront Freddy.
Jason's being too afraid to go through water initially seems like a continuity error, as severalpastFridaymovies have repeatedly shown him having no problem wading through water to go after a target. Then you remember this happens when he's in his own nightmare, and even though he's been able to overcome it in the past, he's become much more susceptible to his fear of it in the dream world.
It could also be justified by looking at how things ended up for him the last few times he was in the water. In Part VI and VII, he was trapped at the bottom of Crystal Lake, and in Part VIII he wound up being separated from his home.
Or, when you take into account that Freddy taps into the fears of his victims, Freddy tapped into Jason's fear of water that he last felt, when he was drowning a child. Think about it: Jason has no issues with water as an adult, but he also doesn't fear anything after that either. The last real time he felt any fear whatsoever was when he was a child and the last time he felt fear of water was while he was drowning. Freddy tapped into Jason's memory of his fear and used it.
Freddy's strange bout of Offscreen Teleportation could be explained by him running like hell and scampering up the platform while Jason is taking his time to stand back up after the torpedo strike.
Kia's use of the word "faggot" to offend Freddy. It was still somewhat of an insult in 2003. But Freddy died in the 60s. Kia knew that he came from a time when being accused of homosexuality was much more serious.
Jason starts attacking when Freddy is about to murder Lori in her nightmare after a bout of sexual harassment - just as he killed the raver about to rape Gibb. He also seemingly comes out on top in his fight with Freddy. Since this is partially a Friday the 13th movie, the old rule applies - Jason kills the horny and the Asshole Victims before targeting the more chaste and innocent. So Jason apparently gets the kill on the evillyperverted Freddy ahead of the comparatively far more virtuous teens and thus fulfills his movies' tropes, but since the A Nightmare on Elm Street movies usually end with the implication that Freddy is Not Quite Dead, Freddy is suggested to still be alive and thus fulfills his movies' tropes.
It makes perfect sense that the attack that finally renders Freddy completely defenseless is Jason shoving the dream-killer's own glove through Freddy's back. This film's premise holds that Freddy's power comes from belief - specifically fear - and we've known since Dream Warriors that he's invulnerable from attacks he doesn't believe in himself (i.e. the gamer's wizard spell he dismisses as "fairy tales"). But it's been established since Freddy's first line ever ("This is God") that he does believe in his glove.
Rather a subtle one at the start with Freddy. Krueger is in Hell, and (theoretically) suffering the torments of the damned. What do we see of his 'torment'? Freddy surrounded by pictures of all the children he murdered, while being unable to kill any more. That is Freddy Krueger's Hell. Knowing that he killed dozens of children... And can't kill more of them. He's THAT evil.
Jason's version of Hell is in Camp Crystal Lake. He's killing teenagers. They're all very bad. But no matter how many he kills, they won't die. They keep coming back and he can't finish the job.
It is heavily implied that Freddy killed Jason to begin with. If Freddy was murdered by the parents of Elm Street before their children were born...then that would make the date of Freddy's death at somewhere around 1970. Jason died in 1957. In other words...Freddy murdered children for at least 13 years.
Well, Jason's nightmare implies that his drowning wasn't wholly accidental, and that other kids bullying him pushed him into the water. . .
We see (in Freddy Nightmare-O-Vision, granted) that Pamela Voorhees wasn't entirely wrong to blame the counselors, if this version of events is remotely true. While the other kids were bullying Jason, forcing him into the water where he couldn't swim strongly enough to save his own life, the counselors were doing everything but keeping an eye on the kids. If they'd actually been paying attention, they would have noticed a childish prank about to go lethally awry.
Just the very fact that both Freddy Krueger and Jason Voorhees exist in the same world! The fact that ANYONE is still alive is nothing short of a miracle!
Not just in the comics. There are two times in Evil Dead 2 that shows Freddy's glove at Knowby's cabin (one above the door inside of the shed and one in the fruit cellar), indicating he might have been at the Knowby Cabin and working on early versions of his glove. We know that Evil Dead is canon to the Friday The 13th due to the inclusion of the Necronomicon in Jason Goes to Hell: The Final Friday. And due to the Friday the 13th: The Game, we find out that Tommy Jarvis ended up at Westin Hills with cuts on him. And even worse, due to The Jarvis Tapes from the game, we know that Hatchet and Shocker also shares the same universe, too.
