I just made this one up. So it might suck.
One day me and my parents got an invitation to a fancy dinner, it was on friday, 7:00 PM. When we got they're we knocked on the door, some pale looking man opened the door, we took off our coats, and then sat down. The pale looking man sat down at the far end of the table, While I was eating I had to go to the bathroom, I walked in and did my buissness, I came out to see everyone was gone. I called the cops and they got here in about 5 minutes, I told then that everyone was gone, and I have no way to get home. I told them my address, and then they took me there. I got out and saw my parents, the cops left and I walked in the house. What I saw was shocking, They were dead, and had blood marks on them, I went to get the phone and to call 911, the phone lines were ripped out. I ran upstairs to get the phone there, and there I saw the pale man, with blood on his mouth.