National Lampoon's Christmas Vacation

Chevy Chase is at his Clark Griswold-best in Christmas Vacation as he tries to present the perfect family Christmas. Of course, we all know that’s where he went wrong. Particularly painful to witness is when Clark completely loses it after he’s reached his boiling point near the end of the film. Shooting expletives and insults equally across the family, his perfect Christmas completes its dissolution into chaos with his finale tirade.