After a 25-day, nine-game road trip, the San Antonio Spurs were glad to be back in their own building, relaxed and ready to add to their 18-game home winning streak. Maybe too relaxed. Jermaine O'Neal had 22 points and 13 rebounds, Wesley Johnson hit a 3-pointer at the end of regulation to force overtime and the Phoenix Suns rallied to upend San Antonio 105-101, stunning a raucous crowd that had begun celebrating midway through the third quarter only to exit in silence.