By the order of the Virginia Safety Commission, the Norfolk Rotating Vortex Of Sharp Knives public-works project was temporarily closed Monday. 'Until we deem that this whirling knife vortex fully complies with all state and federal safety regulations, we unfortunately have no choice but to shut it down,' commission spokesman James Fenten said. Vortex operators are angry. 'Closing the vortex is costing dozens of workers their paychecks,' project supervisor Carl Blaine said. 'It's costing the city $100,000 every day it's down. This city needs a gigantic, funnel-like chasm with whirling, razor-sharp steel blades protruding from all sides, and it needs it now.' 