This is probably a dumb question, if so, you can defenestrate me immediately.
When I concentrate REALLY hard on something, I begin to “pulse”, as in my viewpoint goes forwards then backwards really quickly. If I think about it too much it stops, but it’s more weird than anything else, is this like an OBE, or just something to do with concentration?
I’m not sure I know what you’re talking about 
It might be something like the well known “vibrations” feeling you get sometimes when you WILD. Do you get this when completely awake?
Also, there’s no such thing as a stupid question! 
I’m not entirely sure what people are talking about when they talk about vibrations, maybe that’s it, but I can’t be sure. It’s almost as if the room is getting smaller and bigger quickly! I don’t know what it is.