HOUSTON—Parking-ramp attendant Bill Butler was detected making a slight movement Monday, sending shockwaves through the paid-parking industry. "He was sitting in his little booth, inert as usual, when his head turned about two degrees to the right," witness Lydia Ford said. "I thought I was seeing things, but then, about 30 seconds later, he shifted a tiny bit in his seat." Monday's incident is the first reported case of parking-attendant motion since 1983, when a San Diego ticket collector scratched his cheek.