Bug in Northern Australia

Bug in Northern Australia

Observation - Bug in Northern Australia. Description: About 7 inches in length and found in far north queensland and when i tried to pick it up it let out a very load hiss. would love to know what this is?

About 7 inches in length and found in far north queensland and when i tried to pick it up it let out a very load hiss. would love to know what this is?