10 Horror Movie Monsters You Were Completely Unprepared For

10. Rat Vampire - From Dusk 'Till Dawn

Robert Rodriguez's action-packed crime thriller From Dusk Till Dawn follows two criminal brothers who seek refuge in a bar. Little do they know the sleazy saloon is infested with crazed vampires.

Heavily outnumbered, gun-toting bank robber, Seth Gecko (George Clooney), allies with anybody he can find, including a biker called Sex Machine. Sadly, the codpiece-wielding badass is turned shortly after.

While gnashing at Seth, Sex Machine has his head ripped off with a whip. Though this isn't the traditional way to dispose of a vamp, Sex Machine seems done for, especially after he gets an arrow through his decapitated skull.

But since Sex Machine wasn't exposed to a wooden stake, holy water, or sunlight, the aptly named bloodsucker is far from finished. While Seth turns his attention to the remaining ghouls, Sex Machine blooms a new head and transforms into a rat creature. 

This turn of events is shocking in its own right, but it's extra effective thanks to the astounding practical effects. (The dinosaur-like roar that Sex Machine lets out is the cherry on top.)

The overgrown rodent is executed moments later, but Sex Machine's metamorphosis is a major highlight, which is saying a lot, considering From Dusk 'Till Dawn has plenty of quality moments.