Maybe one of you can explain this.  From time to time I experience
a strange kind of feeling (I have all kinds of weird feelings) which
can be best described as the feeling of "losing gravity", like that one
experiences in a descending elevator.  Needless to say, it is not
enjoyable.  It sometimes comes with shortness of breath and extreme
fatigue.  It lasts from a few minutes to an hour and when it lasts
that long, it makes me sweatening.

Initially I called it "palpitation (spelling?)" until I later learnt that
the terminology has been reserved for the self-awareness of heart beats.

So, is there a specific term for this feeling, or am I a stragne person?
I always believe I am unique.

Thanks.

Ping