(IDEX Online) - A gang smashed glass cabinets then fled with jewelry and Rolex watches in a lightning raid that was over in just 20 seconds.At least seven hooded thieves targeted Infinity & Co jewelers at a mall in Daly City, San Mateo County, California, USA, last Wednesday evening. "They all came at the same time and start hitting our cases," manager Grace James told local TV station KPIX 5. "I felt so violated, because look it's happening in front of my face, and I can't do anything. I was just screaming."She was standing near the store entrance when the raiders struck. They stole Rolexes, rings, chains, and other items. Nobody was hurt. No value has yet been given of the goods taken.Screen grab shows some of the raiders fleeing.