I have come across so many of these and more accurately their webs. Any room or basement that's not in use and it does not take long for these spiders to have a web set up just for you to walk into a try out your ninja skills.
These are also called vibrating spiders. When disturbed they violently spin in a fast circular motion.
Cellar Spiders belong to the scientific family Pholcidae. Spiders in this family typically have extremely long and skinny legs with small bodies. The web of a cellar spider is usually very messy, similar to the web of a cobweb spider. Like all spiders, cellar spiders have 8 legs, 2 body parts, and fang-like mouthparts called chelicerae.
SIZE: Body length of adult cellar spiders about 1/4" or less
LIFE CYCLE: Simple metamorphosis: like all spiders, young cellar spiders hatch from eggs and look like tiny adults. They shed their skin as they grow. Females lay a few dozen eggs at a time and wrap them in webbing for protection.
ECOLOGY: Cellar Spiders often make their stringy webs indoors, preferring shady corners in basements, pantries, closets, attics, barns, and sheds. They feed on small moths, flies, gnats, mosquitoes, and other creatures that are common indoors. When they are not living in buildings, cellar spiders are sometimes found in protected natural areas, including caves and rock piles.
PEST STATUS: Cellar Spiders are common in homes, but they typically stay in one place and don't bother people. They are not known to bite.
CELLAR SPIDER FACTS: Some cellar spiders use a sneaky trick to catch food. When food is scarce, these cellar spiders abandon their webs and find the webs of other spiders. They will then tap on the web, mimicking a trapped insect. When the owner of the web comes to catch its "prey," the cellar spider captures and eats it.