The cop hands her the sign-in sheet, which is actually a notebook computer with an electronic pen. She writes "Y.T." on the screen, it's converted to a digital bitmap, automatically time stamped, and sent off to the big computer at Fed Central. She knows she's not going to make it through the metal detector without stripping naked, so she just vaults the cop's table—what's he going to do, shoot her?—and heads on into the building, skateboard under her arm.