Yeah, i've experienced that a couple times as well. I don't even know how to explain it. I actually had it last night. I hadn't smoked all day (or today either...yuck two days being dry) and boom it just felt like the room was spinning and I was sort of seeing closed-eye visuals. It was kind of startling, but at the same time, interesting.

Sure as fuck doesn't compare to being high, I can tell you that much.