Help mi out ...

basically, these teenagers (surprise surprise!) stupidly go into a haunted abandoned mental hospital and weird things start to happen. Hallucinations and killings start to happen, people get possessed and the 3rd floor is the floor that's the most haunted. Now that's about all that happens without giving the movie away but it's a very good movie, it's worth watching and it makes you jump a lot if you're a jumper cuz I know I am lol, my friends and I were jumping and gasping throughout the whole thing! So I hope that I could help and it's definitely a great movie to watch in the dark.