Because so many of them are found in houses, spiders of the family Pholcidae are among the most frequently encountered spiders.Although I’ve known this spider all of my adult life (it’s common in bathrooms and is widely called the cellar spider), thanks to Wikipedia I recently learned something fascinating and entertaining about it. These spiders have a messy web with no apparent pattern. Usually you’ll see them waiting near the center of the disorganized mass of web. But watch the video above to see what happens when they are disturbed. This one is in the home bathroom.