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.
My best friend had the same thing happen to him in high school. A girl didn’t like my friend’s gf, so she made up a story about him raping her. Thankfully she eventually admitted it, but it still put my buddy through a lot of mental anguish in the meantime.