Yeah you know I was just thinking that my line of work(microbiology) is totally dependent on believing in things you can't actually see which is kind of the exact opposite of dealing with a hallucination where you have to not believe in something you can actually see....weird. But yeah the things you can't see will kill you the fastest...the other thing to worry about is ticks and poisonous spiders----my cousin got rocky mountain spotted fever from a tick and actually got bitten by a brown recluse in her condo...she tends to have pretty bad luck. She lives in Atlanta so I'm not sure if those two are regionally specific or not but I don't think I'd go barefoot down there.