It looks like a tarantula, but what you're actually seeing is a contortionist covered in body paint. She's bent over backwards in a bridge position. You can see her move like a spider in this video.
Isn't that amazing? This is the work of Emma Fay, a body painting artist in the UK. She recently hired two contortionists to serve as models. Lowri Thomas spent 5 hours undergoing this makeup transformation. Jonathan Macauley photographed it. You can see more photos of their work here, including these contortionists appearing as a giraffe and a seahorse.
Content warning: artistic nudity.
-via Fashionably Geek