Holy shit.
If I ever found a spider of that size behind a clock I would burn all of my belongings, just to make sure I'd never find one of those fuckers hiding again.
I hate any type of bug that I magically "find" somewhere. One time I was sorting through a bunch of old crap in my basement (which consisted of mostly old paper) and I saw a millipede crawl out from under the paper I was holding. I was done cleaning for a long, long time. Even worse, somehow a demonic beetle thing (I'm talking one with praying mantis claws and all) got stuck in a screwhole in my light socket before. I'm guessing it was trying to crawl out of the wall and got stuck. I went to plug something in, and this...THING! hisses and tries to bite me. I spared no mercy.
I will kill anything that scares me.