Hey everyone! This is my first post here...anyways!

I need help with identifing these films! I have never found out what there titles are!

#1---I remember in this movie there was a monster living in a bathroom stall. And a boy kept telling his teacher that it was in there and when she went to check it out it grabbed her and pulled her up in the ceiling of the bathroom. Also in the same movie there was a boy with a fear of roaches...or something like that, and at the end it showed him laying on a bed or hammock and his arms and legs had been cut off and replaced with metal hooks/jagged looking rods. Also in the same movie there was a janitor, but he was really a monster living as a human in disquise. At the end it showed two boys in a tent and the creepy janitor guy unzipped the tent and changed into a monster and came in and attacked them. This seemed like it was a early 90s film.

#2---I remember that these people were out in the middle of the ocean at some research plant and there was some alien monster thing walking around. This film seemed like it was in the 70s or early 80s. At the end I remember some blonde chick shooting the monster. This was more of a sci fi flick.

#3---I don't remember this movie at all...just the cover of the video...It showed a monster on the front wearing a white doctor's coat that went down to its ankles. I think it was a sci fi film. Seemed like it was a late 80s film.

Well thats it...If anyone one knows any of these films then please let me know something! Sorry I couldn't give anymore info on the second and third film!