Nurse had the perfect setup to be a wonderfully fun camp film with a healthy dose of blood and sex, but it doesn't take advantage of anything that it has going for it. A big problem that contributed to this is that the movie lacks any real focus - it doesn't fully commit to what kind of movie it wants to be, and it doesn't fully focus on a single character. Abby's voiceover throughout suggests that as our narrator, the movie should be told through her eyes. And yet, half of the film seems focused on Abby and the other half seems focused on Danni, the protagonist. The tone is also hard to place. It's a black comedy, but it's not funny at all. It's bloody, but it's not exactly horror all the time. I don't know what it is.
Speaking of the bloody showdown - it really is the best part of the movie, but it's not enough. If Abby was this crazy murderer without a conscience, then we should've gotten some better kills earlier in the movie than just her pushing some guy off a roof. They save all the really good, bloody stuff for the end and it's over far too quickly for it to be satisfying. The flow of the action at the end is also really off and everything happens too easily for Abby. How the hell did she get out of the hospital after all that carnage anyway, SERIOUSLY? Danni is pretty much forgotten about at the end, and another character who they try to make all symbolic (the only man Abby likes) is talked into committing a felony also way too easily just so they can get to the winky-wink ending they had picked out.
I don't know about you all, but I was left with a huge "That's it?" reaction for Nurse. If they had really embraced the inherent campiness that the movie had going for it visually, it could have been much more fun and effective.