Well, we can calculate the gravitational force.  F=G*M1*M2/r^2  where G=6.67x10^11 N-m^2/kg^2, M1=Mass of object (kg), M2 = your mass (kg), r = radius (m).  It is tough to get r because object is not a sphere and mass on opposite sides of us (if standing on the neck) would cancel out. It has a mass of 1.0x10^13 kg (wikipedia) and has dimensions of 4.1 x 4.5 km (wiki).  Lets assume a sphere of radius 2 km just for fun.  My mass is 82 kg (insignificant so ignored) F=G(1.0x10^13)/(2000^2)F= 0.0002 newtons  <================= Err... kinda small.  Even less if you stand on the neck and the mass on either side cancels out. Yes, the stated formula and constant are from memory.  Love Physics!  :-) Bruce Hugo Equipped with his five senses, man explores the universe around him and calls the adventure Science.   - Edwin Powell Hubble