I've known a lot of pathological liars. Usually it's just a simple exaggeration of something that really happened to them, but a couple of times it's been something completely bizarre.
I had a piano teacher in 4th grade who told my parents that I was going through the stuff in her house before my lesson, while she was with the kid before me. I don't know where the hell she got that, all I ever did was come in the back door and down the stairs and wait in the hallway like I was supposed to. I think one time I used the basement bathroom she told us we could use.
But she told my parents that I was going up through her bedrooms and stuff, opening and closing drawers. She told them that she could hear my footsteps and hear the drawers opening and closing.
If that was the case, why didn't she leave her lesson and come bust me? Oh, right, because I was sitting in the damn hallway like she told me to the whole time
