Ok; sometimes I'll see these "Imaginary Line" like things, I NEED to try and cath them for some reason, but they always just fly out of my hand (Well, they're imaginary, so of course) and ignoring it won't make them go away either, what is this? Sometimes I'll also get them near my mouth and need to try to "inhale" them. Also, these are not floaters, I can start straight at them, and I can tell they're just my imagination.