Gravity from spacetime curvature

[marthkiki]

After a while of trying to understand this, it's still kind of confusing. I get how the planets orbit around the sun because of the sun's spacetime curve, but if one were to drop something, how does spacetime curvature cause it to fall? How can everything in the universe have a gravitational effect on one another? Is it because the spacetime curvature from all objects extends to an infinite range?

 

[A.T.]

but if one were to drop something, how does spacetime curvature cause it to fall?

In simple terms:
http://www.physics.ucla.edu/demoweb..._and_general_relativity/curved_spacetime.html
http://www.relativitet.se/spacetime1.html
http://www.adamtoons.de/physics/gravitation.swf