That is awfully odd... well, if you give in and indulge in a wee bit more than you know you should, do be sure to come back and let us know if it's still "back seat" stimulation or if you're unpleasantly spun or what. I definitely get sick of I take enough 2-FMA to try and really "feel it," ya know. 4-FMA I just plain don't like, so I wouldn't know about that... but to me that sounds a lot like what 2-FMA does to me. Obviously just anecdotal, but for what it's worth & all.