10 Greatest 'I'm Dead And I Know It' Moments In Slasher Horror Movies

For Hal Wainwright (Lawrence Dane), the imagine here is of him realising he is absolutely screwed during the final act of 1981's Happy Birthday to Me.

Opposite Hal in this shot, we have a party table that features a bunch of dead bodies strapped to chairs, including the corpse of his long-deceased wife. If that wasn't bad enough, next to Hal is his deranged daughter Ginny (Melissa Sue Anderson), who is celebrating both a) her birthday, and b) having slaughtered a bunch of her friends and dug up her dead mother.

Dane's character had returned home to mark his daughter's birthday, yet all he found was chaos, carnage and his own impending death - with Ginny quickly slicing Hal's throat after she'd got done blowing her candles out.

Of course, Happy Birthday to Me has one of the most nuts slasher endings imaginable.

In a finale that seems tacked on to what was supposed to be the original ending, Happy Birthday to Me concludes be revealing how the real killer of the movie is Ginny's best pal Ann (Tracey E. Bregman) - who is actually Ginny's half-sister and has been wearing a latex mask of her sibling's face to commit the film's murders.