When I was young I came upon the scary maze game, without knowing what it was. It was the middle of the night and my parents were asleep too. I was so scared of the face I blocked it out with my hand as I looked for the close button. I tried showing it to my parents but they thought I was crazy because I thought it just happened if you touched the walls, not at that certain point.
My sister used to torment me with screamers, to the point that after getting scared I would avoid the computer for weeks. Screamers have that lasting effect now, I think I was traumatized by them. There was one she showed me once that was a picture that either was or looked like our house [My memory is hazy] that she used on me once. One late night on the living room computer I saw a weird bookmark in my folder and recognized it immediately... it was the screamer. I covered my face on the couch and actually fell asleep. I found out later that my Mom had accidentally bookmarked it and felt so bad.