I’ll start. Teenage me driving up the street to hang out with friends at the mall and passed my younger neighbor and his mom. When I got back a couple hours later, the neighbor’s mom was livid - confronting me for the slight. I seriously had no idea wtf she was talking about and I couldn’t convince her otherwise.
Last year my (then) gf got it into her head that I’d been unfaithful to her with my neighbour, and on one occasion snapped and physically assaulted me in my own home. She then claimed to friends and family that I assaulted her, presenting photos of bruises on her arms and face as “proof”.