While outside, have you ever come across something odd looking that you just can't figure out what it is?
What do you do when you that happens? If you're a little braver than I, you might be tempted to touch whatever it is to figure it out. I think it goes without saying that touching something strange you find on the street is a very risky proposition.
Still, if you think I'm being silly and paranoid, then I'll let the following video do the convincing for me. In it, Paglo Barroeta comes across what he thinks is a clump of hair. To verify his conclusion, he decides to poke it.
That was a bad idea...
In case you're wondering, those are daddy longlegs spiders. While they're not poisonous or harmful to humans, who wants a bunch of them crawling all over you hand? Not me, that's for sure.