A nearly 2 hour excuse to showcase some grisly deaths and silly plot twists, but that's not a bad thing. I did sometimes wonder if the film's content really supported the run time, but the pacing isn't terrible, so you don't spend most of the movie checking your watch. It's nice to see Melissa Sue Anderson in something other than Little House on the Prairie and she's really likable in this as the birthday girl with memory problems whose friends keep disappearing and she might be the one responsible. The finale is one of the silliest and most entertaining conclusions I've ever seen.
Review of Happy Birthday to Me
