When it's really hot outside, I typically wear shorts to work. Recently, I had to get something out of a low cabinet, and while sitting on the floor, I saw this critter about three inches from my knee:
That is one of the biggest house centipedes (Scutigera coleoptrata) I've ever seen, probably about an inch and a half in length but looking a lot longer, due to the length of its legs.
House centipedes are uncanny critters, fast, alien, and venomous, though they seem not to be "biters". I'm not the squeamish sort, but the idea of this unheimlich beast being so close to my skin was pretty freaky. For the record, I did not scream, but I did jerk my knee away in a fashion which would have been very comical to a bystander. Good thing I was working alone.