Hi I live in Phoenix area. Last night on my sliding backdoor was about a 3 inch plus Tan bug with orangish legs. It was BIG comparable to the size of a small mouse. It had a head, abd, and thorax. When I squirted it, it fell and ran very very fast under the lawnmower. I was too scared to move the mower and take a better look. Any idea what it might be and should I be scared... THANKS!!

I suggest a Google search, that's how I usually identiy the "unidentifiable" creepy crawlies here in AZ
http://www.simplegiftsfarm.com/gray-insect-identification.html

I have spent hours looking... I can't find it. The closest resemblance is a potato bug but it would be stretched out, a lot bigger and have longer legs. I will keep looking. I am checking out your link now. Thanks :)

I have been searching for hours and hours... I think it was a wind scorpion :-/ I found a really good site. Here is the link http://www.insectidentification.org/