The worlds largest land dwelling arthropod - a type of Hermit Crab. I'd freak out if I saw one of these!
http://www.cryptomundo.com/cryptozoo-news/coconut-crabs/
http://en.wikipedia.org/wiki/Coconut_crab
http://www.cryptomundo.com/cryptozoo-news/coconut-crabs/
http://en.wikipedia.org/wiki/Coconut_crab