This is kind of embarassing, but I am more afraid of cobwebs than anything else concrete. I guess it's just a strange variation on arachnophobia, but I haven't ever met anyone whose phobia was more centred on spider's webs than on spiders (though I'm not really keen on spiders either). It's not a debilitating phobia so it's not a big issue for me, but I am curious to know if anybody else on this site has this particular phobia.