I also thought I should add that this movie really hit home with me because I actually grew up in a haunted house. Thankfully the spirits that haunt my house aren't malicious, they just pop up to say "Hello" every now and then. Actually, I think my house (or I should say my Mom's house, as I haven't lived there for 20 years now) was built on a doorway between our world and the afterlife, so spirits are constantly traveling through there on their way to the here after. Some things that I personally witnessed:
1) The TV turning on and off by itself, and there was no one anywhere near the remote.
2) Hearing footsteps going down the hall, then down the stairs, when I was home alone.
3) I once saw three man shaped shadows pass by the basement window. I ran outside to see who was in the back yard, and there was no one there (and they didn't have time to run across the yard and duck around the corner, or enter the back door, without me seeing them).
4) Not so much a singular event, but every time I go into the basement I have this uneasy feeling like I'm being watched.
And things others had witnessed:
1) My eldest sister saw the spirit of one of our uncles (I can't remember which one, we'll call him Robert for now) come into her room on the night that he died. The next morning she asked my mom "Why was Uncle Robert sitting on the edge of my bed last night?" Mom told her Uncle Robert hadn't visited us in months. Later that day, Mom got a phone call informing her of Uncle Robert's passing.
2) My brother in law was fixing up the basement to turn it into a rentable suite for my mom. He was in my dad's old workshop, converting it into a nursery for my niece (my sister was about 5 months pregnant at the time). My sister just entered the room with a sandwich and a cup of coffee for him when the A frame stepladder in the middle of the floor (and at least three feet away from either of them) slid about two feet across the floor. Mike said "Did you see that?" Valerie was like, "Yeah, that was just the ghost."
3) On the day my grandma died, my sister and her husband had just come home from a day out with the kids. As they were taking off their shoes, Mike looked downstairs and saw what he thought was my mom at the bottom of the stairs walk off towards the bedrooms. Mike turned to Val and asked "What's your mom doing downstairs?" They went downstairs calling for my mom, and found the hall door to the bedrooms closed and locked. They unlocked it and went into the bedrooms. No one was there, but my nephew's bedroom had been cleaned, his bed made, and all of his toys put away (it wasn't like that when they had left). Later, when my mom got home from shopping, my sister asked her if she had cleaned Niel's room and she said "No." It was later that day that they had learned that Nanny had passed (that's what we used to call our maternal grandma, Nanny). And for a little extra backstory on our family, Nanny used to babysit me and my sisters when we were little, and her bedroom was in the basement and was the same room that Niel later occupied when Valerie and her family moved into the basement.
So yeah, to me Haunted Houses are VERY real.