Someone I knew (not a friend) I use to pass by their house most days and if they were in the garden I spoke to them. They knew I was going to see Alien 3. I was looking through my Sky TV Guide and saw a series of films he was interested in and knew his son had Sky so I popped round to tell him. He then said have you seen Alien 3 yet I said no he said (he gave the end away). As they say no good deed goes unpunished.