Tarantula

Stats:
Just like the little tarantulas, but bigger and it likes to eat cows and humans.

Origin:
A tarantula that has been injected with radiation-treated nutritional supplement formula escapes from a scientist's laboratory. It then grows into a 100-foot high monster.

Facts:
A young Clint Eastwood saves the day in this movie as he is called in as an Air Force pilot to bomb the mountain-sized spider.