Used by Spartans to demonstrate to
Persian messengers the first, second, and third laws of motion. Upon kicking the messenger over the ledge, the messenger exerted an equal force back upon the Spartan. At the same
time, gravity accelerated him down the seemingly endless hole, and he will continue moving with a high velocity until he encounters the ground and transfers momentum to the ground, equal to his acceleration times his mass.
In reality, the phrase is simply one of the most
awesome phrases ever uttered before.
Used in forums or gaming to signify ownage.