Spiders are a necessary part of the world’s ecosystem, but that doesn’t change the fact that they scare the living crud out of lots of people. If you only have a handful of tiny spiders around your places say thanks, you could have the Goliath birdeater. The Goliath birdeater is the largest spider by mass in the world and, as you’ll see in this insane video, makes a terrifying shaking sound as it moves. This sound is caused by their fangs rubbing against their pedipalps, the tiny little appendages on the sides of their heads. If you’re arachnophobic remember this sound. I won’t be able to forget it.