7. Heather Should Be About 40 Years Old - Texas Chainsaw 3-D
The Movie: Billed as the "official" sequel to Tobe Hooper's classic, which follows baby Edith when she's all grown up (she's called Heather now). Predictably, stuff that happened in the first movie happens in this one - except this time in 3-D!
The Plot Hole: This might be one of the dumbest plot holes in recent memory - it's genuinely baffling that the filmmakers didn't notice this when they were putting the sad excuse for a screenplay together. So, if this is a sequel to The Texas Chainsaw Massacre, which is set in 1974, then Heather - who was just, like, a baby in that movie - should be around 40-years-old in the modern sequel, right? Except... she's not. She's about 20. She's some hot 20 year-old, despite the fact that the movie clearly takes place in the present day. Heather was born in 1974, people! It couldn't have been any more obvious how old this character was supposed to be, and yet - somehow - this notion was completely overlooked for the entirety of the writing and the casting process. Did Tope Hooper even realise? I mean, okay, nobody is gonna make a horror movie with a 40-year-old female protagonist, but c'mon - were the filmmakers just hoping that nobody in the world would try to piece the timeline together?
It's a sequel! Of course they would!