This is a simple experiment that might work for some people. There is some nuance to it depending on the health of your vestibular system. Mine is no longer working  and suffer from oscillopsia. I mention something about a ufo along with other pretty wild sounding claims, and I am well aware of that, but it was my experience back in 1985. I'm not a scientist so there's no discussion about particles or math, only some observations of phenomena. I'll leave the theorizing to others trained in the field. I should have documented it with a video at the time, but due to other problems in life, that didn't happen. 

The experiment requires a glass ball, "crystal ball" used as a second mass in addition to the experimenter. I used a 6" (150mm) diameter ~ 9 lb (4Kg) ball. I call it the "human rotary experiment". There is a sequence to the experiment that has to be followed or else I am fairly certain it will fail. It also needs to be performed on solid ground - no basements or crawlspaces below. Perhaps there's a chance that someone may be able to reproduce the phenomena.   

Proceed at your own risk. Should you consider giving it a try, I would suggest surrounding the area with cushioned gym or exercise mats in case you loose balance and take a fall. Also provide a carpet and additional rug to prevent breakage in the event you should drop the ball, which may occur in one mode of the experiment. 

It involves this important sequence. ***FIRST*** rotate yourself and the ball held in your right hand somewhat away from your waist, in the CCW direction (as viewed from above) for several revolutions. ***THEN*** reverse the ball's rotation by passing it hand to hand around waist in the opposite direction of your own rotation, forming an orbit close to your waist. But do not bring the ball to zero velocity WRT earth. Allow slow CCW orbit of ball WRT earth. More detailed instructions at link below. 

http://inertiaexp.com 

or 

http://sites.google.com/site/diygravity