The 5 scariest people in Silicon ValleyHalloween's on a Friday. With people already more worried about keeping their jobs than actually doing them, you might as well plan on writing the workday off. Trying to figure out a clever costume in which to pester your remaining coworkers? Valleywag has done the work for you. Print up one of these masks, designed by Valleywag interim creative director Richard Blakeley, on the finest-quality office paper you can steal from the supply closet, follow our tips on how to act the part, and you're good to go. Select from our list: