I want to jot down some superstitions just for the hell of it, but also so it's here if it comes true.
I saw a line across someone's neck today but I don't think I saw it properly and then it wasn't there.
Come to think of it, I noticed a similar thing in the mirror with my neck. I turned the corner and I did a double take only because I thought my neck was bleeding, but then I looked and it was just a shadow I saw in my periph while turning a corner.
I don't know if it's symbolic for keeping silent, or someone else wanting you silenced. I hope it's not literal.