Don't worry Marty, I do it all the time.
I alway's get sucked into a really bad sci fi or horror movie.
You have a pretty good idea of what is going to happen and how it's going to end but you still have to watch it to the end.
There was one last night Resident Evil - Extinction. I've played the game, knew the plot but still watched it though.
It did have one thing going for it Milla Jovic.