Move over, Roswell. South Orange County is recording its own share of UFO sightings. Several residents have reported the sightings to the Orange County Sheriff's Department in recent months. And word has even reached a Canadian UFO researcher who has posted information about the sightings on his Web site.In one case, witnesses reported seeing glowing disks zigzagging through trees and hovering above the Aliso Viejo Town Center at night. About a yard in diameter and studded with flashing lights, the four UFOs dance around one another in the night sky.These flying saucers aren't a top-secret military project. But they aren't being piloted by Martians, either.The saucers are made in the garages of Gaylon Murphy and Steve Zingali, who get their kicks shocking people and hope to earn a few bucks hawking their remote-controlled saucers. After all, a few UFO sightings can only be good for business."We fly them in formation. It's pretty funny," said Murphy, a cardiovascular surgeon and Aliso Viejo resident. "People stop, people scream, one cabdriver ran his car up off the road."Nick Peterson was stunned when he saw one of the disks fly past his girlfriend's upstairs apartment."I thought, 'That can't be a UFO, can it?' " he said. "It's pretty weird."The disks are made of foam and weigh about a pound. Each runs on a 7.4-volt lithium battery and has a propeller.On weekends, Murphy flies the disks in Aliso Viejo, Newport Beach, Mission Viejo and Laguna Niguel. He and Zingali, a facilities engineer and Mission Viejo resident, have sold four of the gizmos at $1,000 each and concede their streaking light show is part hobby, part promotion."It's good marketing," he said.The Canadian UFO Web site, which logs oddities from supposed saucer sightings to alleged alien abductions and offers an assortment of paranormal literature, indicates that the homemade disks have captured the attention -- and the imagination -- of both the skeptical and the true believer.The disks sparked a confrontation between Murphy and Erik Strong, a manager an Aliso Viejo restaurant and bar. Strong said Murphy was spooking his staff by hovering his disk near the restaurant."It looked like something right out of a movie, a little too real," Strong said. "I wouldn't say I made the determination that they were actual UFOs, but it did pique my curiosity enough to see where it was coming from."