A knife-wielding maniac was caught on terrifying doorbell camera footage repeatedly making stabbing motions outside stunned Sacramento-area homeowners’ front doors — sending an Arden neighborhood into panic as the suspect remains on the loose. Rebecca Breen and her husband were watching TV around 8:30 p.m. Thursday when their Ring camera suddenly began sending alerts that someone was at their front door, KCRA reported.   A knife-wielding maniac was caught on terrifying doorbell camera footage repeatedly making stabbing motions outside stunned Sacramento-area homeowners’ front doors. Ring “We started getting alerts on our phone that there was action on our motion on our Ring camera at the front door,” Breen told the outlet. Moments later, the couple heard pounding. Rebecca Breen and her husband were watching TV around 8:30 p.m. Thursday when their Ring camera suddenly began sending alerts that someone was at their front door.…